Scott Foresman Science

Grade K

Interactive Presentation Software Credits
08_gK_ch01_howtoread.flp: Getty Images/BrainWorks Studio, Getty Images; 08_gK_ch01_song.flp: Getty Images; 08_gK_ch02_song.flp: ©Barbara Peacock/Taxi/Getty Images; 08_gK_ch03_howtoread.flp: Digital Vision; 08_gK_ch03_lesson4.flp: ©Fred Bruemmer/Peter Arnold, Inc.; 08_gK_ch03_song.flp: Digital Vision, ©Jeff Hunter/Getty Images, ©Wayne Levin/Getty Images, ©Mark Newman/Photo Researchers, Inc.; 08_gK_ch04_song.flp: ©Thomas D. Mangelsen/Peter Arnold, Inc.; 08_gK_ch05_howtoread.flp: © Comstock, Inc.; 08_gK_ch05_song.flp: ©Ariel Skelley/Corbis, ©Onne van der Wal/Corbis; 08_gK_ch06_howtoread.flp: Getty Images, ©Royalty-Free/Corbis, Rubberball Productions; 08_gK_ch06_song.flp: ©Rob Van Petten/Getty Images, ©Corbis; 08_gK_ch07_lesson1.flp: Getty Images, ©Stone/Getty Images, ©Ian Royd/Getty Images; 08_gK_ch07_song.flp: ©Rubberball Productions, ©Brand X Pictures/Getty Images, Getty Images,  ©ThinkStock/SuperStock; 08_gK_ch08_howtoread.flp: Getty Images; 08_gK_ch09_song.flp: ©Lorentz Gullachsen/ Stone/Getty Images, ©Zephyr Picture/Index Stock Imagery; 08_gK_ch10_howtoread.flp: Getty Images, ©LWA-Dann Tardif/Corbis, Corbis, ©Cindy Charles/PhotoEdit, Getty Images; 08_gK_ch10_lesson2.flp: ©DK Images, Brand X Pictures; 08_gK_ch10_lesson3.flp: ©DK Images, ©Gary Buss/Getty Images, ©Karin Slade/Getty Images, ©Brand X Pictures/Getty Images, ©George D. Lepp/Corbis; 08_gK_ch10_song.flp: Getty Images; 08_gK_ua_mathinscience.flp: ©George D. Lepp/Corbis, Getty Images, ©Randy Wells/Corbis, ©Gary Vestal/Getty Images,  ©Ed Collacott/Getty Images,  ©Diaphor Agency/ Index Stock Imagery, ©Davies & Starr/Stone/Getty Images, ©Laurie Campbell/Stone/Getty Images; 08_gK_ua_wrapup.flp: Getty Images, ©Barbara Peacock/Taxi/Getty Images, Digital Vision, ©Jeff Hunter/Getty Images, ©Wayne Levin/Getty Images, ©Mark Newman/Photo Researchers, Inc.; 08_gK_ub_wrapup.flp: ©Thomas D. Mangelsen/Peter Arnold, Inc., ©Ariel Skelley/Corbis, ©Onne van der Wal/Corbis; 08_gK_uc_wrapup.flp: ©Rob Van Petten/Getty Images, ©Corbis, ©Rubberball Productions, ©Brand X Pictures/Getty Images, Getty Images,  ©ThinkStock/SuperStock; 08_gK_ud_mathinscience.flp: ©Rob Bartee/SuperStock, ©Royalty-Free/Corbis, Getty Images; 08_gK_ud_wrapup.flp: ©Lorentz Gullachsen/ Stone/Getty Images, ©Zephyr Picture/Index Stock Imagery, Getty Images.

Interactive Presentation Software Credits –Florida
fl_ch01_howtoread.flp: Getty Images/BrainWorks Studio, Getty Images; fl_ch01_song.flp: Getty Images; fl_ch02_song.flp: ©Barbara Peacock/Taxi/Getty Images; fl_ch03_howtoread.flp: Digital Vision; fl_ch03_lesson4.flp: ©Fred Bruemmer/Peter Arnold, Inc.; fl_ch03_song.flp: Digital Vision, ©Jeff Hunter/Getty Images, ©Wayne Levin/Getty Images, ©Mark Newman/Photo Researchers, Inc.; fl_ch04_song.flp: ©Thomas D. Mangelsen/Peter Arnold, Inc.; fl_ch05_howtoread.flp: © Comstock, Inc.; fl_ch05_song.flp: ©Ariel Skelley/Corbis, ©Onne van der Wal/Corbis; fl_ch06_howtoread.flp: Getty Images, ©Royalty-Free/Corbis, Rubberball Productions; fl_ch06_song.flp: ©Rob Van Petten/Getty Images, ©Corbis; fl_ch07_lesson1.flp: Getty Images, ©Stone/Getty Images, ©Ian Royd/Getty Images; fl_ch07_song.flp: ©Rubberball Productions, ©Brand X Pictures/Getty Images, Getty Images,  ©ThinkStock/SuperStock; fl_ch08_howtoread.flp: Getty Images; fl_ch09_song.flp: ©Lorentz Gullachsen/ Stone/Getty Images, ©Zephyr Picture/Index Stock Imagery; fl_ch10_howtoread.flp: Getty Images, ©LWA-Dann Tardif/Corbis, Corbis, ©Cindy Charles/PhotoEdit, Getty Images; fl_ch10_lesson2.flp: ©DK Images, Brand X Pictures; fl_ch10_lesson3.flp: ©DK Images, ©Gary Buss/Getty Images, ©Karin Slade/Getty Images, ©Brand X Pictures/Getty Images, ©George D. Lepp/Corbis; fl_ch10_song.flp: Getty Images; fl_ua_mathinscience.flp: ©George D. Lepp/Corbis, Getty Images, ©Randy Wells/Corbis, ©Gary Vestal/Getty Images,  ©Ed Collacott/Getty Images,  ©Diaphor Agency/ Index Stock Imagery, ©Davies & Starr/Stone/Getty Images, ©Laurie Campbell/Stone/Getty Images; fl_ua_wrapup.flp: Getty Images, ©Barbara Peacock/Taxi/Getty Images, Digital Vision, ©Jeff Hunter/Getty Images, ©Wayne Levin/Getty Images, ©Mark Newman/Photo Researchers, Inc.; fl_ub_wrapup.flp: ©Thomas D. Mangelsen/Peter Arnold, Inc., ©Ariel Skelley/Corbis, ©Onne van der Wal/Corbis; fl_uc_wrapup.flp: ©Rob Van Petten/Getty Images, ©Corbis, ©Rubberball Productions, ©Brand X Pictures/Getty Images, Getty Images,  ©ThinkStock/SuperStock; fl_ud_mathinscience.flp: ©Rob Bartee/SuperStock, ©Royalty-Free/Corbis, Getty Images; fl_ud_wrapup.flp: ©Lorentz Gullachsen/ Stone/Getty Images, ©Zephyr Picture/Index Stock Imagery, Getty Images.

Grade 1

Active Glossary Credits
alike : ©Lynn Stone/Index Stock Imagery; camouflage :Stephen Krasemann/Stone, T. Kitchin and V. Hurst/NHPA Limited, ©RichardK. LaVal/Animals Animals/Earth Scenes, Corbis, ©D. Robert & LorriFranz/Corbis, Jean-Louis LeMoigne/NHPA Limited; clay : ©DK Images; cloud : ©Paul A. Souders/Corbis; desert : ©Yva Mornatiuk/John Eastcott/Minden Pictures; different : ©Bruce Ando/Index Stock Imagery, ©The Image Bank/Getty Images; draw conclusions : ©The Image Bank/Getty Images; flower : Corbis; food chain : Neil Fletcher and Matthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/Getty Images; forest : ©W. Perry Conway/Corbis, ©Taxi/Getty Images; fuel : ©Holly Harris/Getty Images; habitat : Clem Haagner; Gallo Images/Corbis; humus : Clive Streeter/©DK Images; larva : ©Michael and Patricia Fogden/Corbis; leaf : ©DK Images; life cycle : ©DK Images; marsh : ©David Muench/Corbis; matter : Big Sesh Studios, ©DK Images; mineral : ©DK Images, Natural History Museum/©DK Images, Colin Keates/Courtesy of Natural History Museum/©DK Images; natural resource : ©D. Boone/Corbis, ©Jim Brandenburg/Minden Pictures, ©Joseph Sohm/ChromoSohm, Inc./Corbis; nonliving : ©Mary Kate Denny/PhotoEdit; ocean : Digital Vision; oxygen : ; predict : ©Roy Rainford/Robert Harding Picture Library, Ltd.; pupa : ©George D. Lepp/Corbis; rain forest : ©Gary Braasch/Corbis; rocks : ©J. Eastcott Film/NGS Image Collection; sand : ©DK Images; screw : ©DK Images; season : ©Taxi/Getty Images; seed coat : ©DK Images; seedling : Derek Hall/©DK Images; shelter : ©Royalty-Free/Corbis; star : ©Roger Ressmeyer/Corbis; stem : ©DK Images; Sun : NASA; tadpole : ©DK Images; technology :Peter Anderson/©DK Images, ©Science Museum/Science & SocietyPicture Library, Getty Images, Stepen Oliver/©DK Images, ©AppleComputers, Inc.; telescope : ©DK Images; weather : ©Nigel J. Dennis/Gallo Images/Corbis, ©Marc Muench/Corbis, ©Taxi/Getty Images, ©Bruce Peebles/Corbis; weathering : Natural History Museum/©DK Images, ©Jeremy Horner/Corbis; wetland : ©Jim Zipp/Photo Researchers, Inc .

Active Glossary Credits - California
animal : Joe McDonald/Corbis, ©George D. Lepp/Corbis, ©Taxi/Getty Images, ©The Image Bank/Getty Images, ©Tom Brakefield/Corbis; answer questions : ©DK Images; blubber : ©Tim Davis/Corbis, Jeff Mangiat; claws : ©Mitsuaki Iwago/Minden Pictures; desert : ©Yva Mornatiuk/John Eastcott/Minden Pictures; environment : Melissa Farlow/Aurora & Quanta Productions, ©DK Images, ©Kurt Stier/Corbis; float : Flip Nicklin/Minden Pictures; fog: ©James A. Sugar/Corbis; food chain : Neil Fletcher and Matthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/Getty Images; forest : ©W. Perry Conway/Corbis, ©Taxi/Getty Images; fur : ©DK Images, Stephen Krasemann/Stone; gills : ©Taxi/Getty Images; hooves : ©Steve Coombs/Photo Researchers, Inc.; insect : ©DK Images; leaves : ©DK Images; light: ©Nicholas Pavloff/Lonely Planet Images; marsh : ©David Muench/Corbis; model: Neil Fletcher and Matthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/Getty Images; nutrients : ©G.I. Bernard/Animals Animals/Earth Scenes ; observe: ©Darrell Guilin/Corbis; ocean : Digital Vision; plant : ©Jim Steinberg/Photo Researchers, Inc., ©Yva Momatiuk/John Eastcott/Minden Pictures; rain : ©Stone/Getty Images; relate prior knowledge: ©Martin Harvey/Peter Arnold, Inc.; retell : ©Tim Barnett/Getty Images; season : ©Taxi/Getty Images; shape : Getty Images; shelter : ©Royalty-Free/Corbis; size : Getty Images; spring : ©Royalty-Free/Corbis; summer : ©Nicholas Pavloff/Lonely Planet Images; Sun : NASA; water : ©David Pu'u/Corbis; weather : ©Nigel J. Dennis/Gallo Images/Corbis, ©Marc Muench/Corbis, ©Taxi/Getty Images, ©Bruce Peebles/Corbis; winter : ©Marc Muench/Corbis.

Active Art
Solar System: ©Getty Images, Mariner 10/NASA, PioneerVenus Orbiter/NASA, Voyager I/NASA/NSSDC, NASA and the Hubble HeritageTeam (STScl/AURA)/Hubble Space Telescope WFPC2/STScl-PRC01-15,NASA/NSSDC (Image Processing by Jody Swann/Tammy Becker/Alfred McEwenusing the PICS [Planetary Image Cartography System] image processingsystem developed at the U.S. Geological Survey in Flagstaff, Arizona),Apollo 17 Crew/NASA, E. Karkoschka et al. (University ofArizona)/NICMOS/HST/NASA, Dr. R. Albrecht (ESA/ESO)/NASA, VoyagerII/NASA.
Observing Objects: ©Getty Images,Mariner 10/NASA, Pioneer Venus Orbiter/NASA, Voyager I/NASA/NSSDC, NASAand the Hubble Heritage Team (STScl/AURA)/Hubble Space TelescopeWFPC2/STScl-PRC01-15, NASA/NSSDC (Image Processing by Jody Swann/TammyBecker/Alfred McEwen using the PICS [Planetary Image CartographySystem] image processing system developed at the U.S. Geological Surveyin Flagstaff, Arizona)

Games
Nanoboy: Courtesy IBM Corporation. Carbon illustrations, Tony Randazzo. Name That Mineral!: DK Images, Colin Keates/Courtesy of the Natural History Museum, London/DK Images. Build a Food Web:DK Images, Stephen Krasemann/NHPA Limited, Jim Zipp/Photo Researchers,Inc., Joe McDonald/Corbis, © Royalty-Free/Corbis, ©Gail Shumway/GettyImages. Ecosystems: ©J. Eastcott/Y. Eastcott Film/NGSImage Collection, ©Enzo & Paolo Ragazzini/Corbis, ©AndyBinns/Ecoscene, ©Jim Zipp/Photo Researchers, Inc.

Active Glossary Credits - Spanish
albergue : ©Royalty-Free/Corbis; arcilla : ©DK Images; arena : ©DK Images; bosque : ©W. Perry Conway/Corbis, ©Taxi/Getty Images; bosque tropical: ©Gary Braasch/Corbis; cadena alimentaria : Neil Fletcher and Matthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/Getty Images; camuflaje :Stephen Krasemann/Stone, T. Kitchin and V. Hurst/NHPA Limited, ©RichardK. LaVal/Animals Animals/Earth Scenes, Corbis, ©D. Robert & LorriFranz/Corbis, Jean-Louis LeMoigne/NHPA Limited; ciclo de vida: ©DK Images; combustible : ©Holly Harris/Getty Images; desierto : ©Yva Mornatiuk/John Eastcott/Minden Pictures; diferente : ©Bruce Ando/Index Stock Imagery, ©The Image Bank/Getty Images; envoltura de la semilla : ©DK Images; estación : ©Taxi/Getty Images; estado del tiempo : ©Nigel J. Dennis/Gallo Images/Corbis, ©Marc Muench/Corbis, ©Taxi/Getty Images, ©Bruce Peebles/Corbis; estrella : ©Roger Ressmeyer/Corbis; flor : Corbis; hábitat : Clem Haagner; Gallo Images/Corbis; hoja : ©DK Images; humedal : ©Jim Zipp/Photo Researchers, Inc.; humus : Clive Streeter/©DK Images; larva : ©Michael and Patricia Fogden/Corbis; mar : Digital Vision; marisma : ©David Muench/Corbis; materia : Big Sesh Studios, ©DK Images; meteorización : Natural History Museum/©DK Images, ©Jeremy Horner/Corbis; mineral : ©DK Images, Natural History Museum/©DK Images, Colin Keates/Courtesy of Natural History Museum/©DK Images; nube : ©Paul A. Souders/Corbis; oxígeno : ; parecido : ©Lynn Stone/Index Stock Imagery; plántula : Derek Hall/©DK Images; predecir : ©Roy Rainford/Robert Harding Picture Library, Ltd.; pupa : ©George D. Lepp/Corbis; recurso natural : ©D. Boone/Corbis, ©Jim Brandenburg/Minden Pictures, ©Joseph Sohm/ChromoSohm, Inc./Corbis; renacuajo : ©DK Images; rocas : ©J. Eastcott Film/NGS Image Collection; sacar conclusiones : ©The Image Bank/Getty Images; sin vida : ©Mary Kate Denny/PhotoEdit; Sol : NASA; tallo : ©DK Images; tecnología :Peter Anderson/©DK Images, ©Science Museum/Science & SocietyPicture Library, Getty Images, Stepen Oliver/©DK Images, ©AppleComputers, Inc.; telescopio : ©DK Images; tornillo : ©DK Images.

Science Games
Question 1 ©The Image Bank/Getty Images, ©DK Images,Geoff Moon/Frank Lane Picture Agency/Corbis, ©Ric Ergenbright/Corbis,Getty Images, ©Michael & Patricia Fogden/Corbis, ©John Lund/Corbis,©G. Renner/Robert Harding Picture Library Ltd., ©Robb DeWall, ©SteveMaslowski/Photo Researchers, Inc., Jerry Young/©DK Images, GettyImages, Brand X Pictures, ©Tony Freeman/PhotoEdit, ©David Parker/PhotoResearchers, Inc., ©Kaz Mori/Getty Images, ©Dan Chung/Reuters/Landov,LLC, ©Ron Thomas/Getty Images, ©Gerald L. Kooyman/Animals Animals/EarthScenes, The Granger Collection, NY, (TR) ©Bruce Burkhardt/Corbis Question 2 ©Taxi/Getty Images, ©Royalty-Free/Corbis, Getty Images, ©William J.Weber/Visuals Unlimited, ©Ted Levin/Animals Animals/Earth Scenes,©Garry Black/Masterfile Corporation, Daniel J. Cox/NaturalExposures.com, ©David Ulmer/Stock Boston, ©Claus Meyer/Minden Pictures,©Yva Momatiuk/John Eastcott/Minden Pictures, ©Paul Almasy/Corbis, ©AlanSchein Photography/Corbis, ©Royalty-Free/Corbis, ©David Paynter/AgeFotostock Question 3 ©J. & B.Photographers/Animals Animals/Earth Scenes, S. PurdyMatthews/Stone/Getty Images, Alan G. Nelson/Animals Animals/EarthScenes, ©Taxi/Getty Images, ©Brand X Pictures/Getty Images, ©The ImageBank/Getty Images, Flip Nicklin/Minden Pictures, ©Carol Havens/Corbis,©Leonard Lessin/Peter Arnold, Inc., ©DK Images, Stephen Frink/Corbis,©Paulo De Oliviera/Animals Animals/Earth Scenes, ©DK Images,©Fotopic/Index Stock Imagery, ©Jose Fuste Raga/eStock Photo,©Duomo/Corbis, Getty Images, Bob Langrish/©DK Images, ©KevinAitken/Peter Arnold, Inc., ©Chris Newbert/Minden Pictures Question 4 ©Tom Brakefield/Corbis, ©Mark L. Stephenson/Corbis, Courtesy of theLondon Toy and Model Museum, Paddington, London/©DK Images, DK Images,Pete Atkinson/NHPA Limited, ©James Watt/Animals Animals/Earth Scenes,Kent Wood/Photo Researchers, Inc., ©Joe McDonald/Corbis, ©RodPlanck/Photo Researchers, Inc., ©Royalty-Free/Corbis, ©RogerRessmeyer/Corbis, ©/Corbis, ©Tom Bean/Corbis, ©YannArthus-Bertrand/Corbis, Getty Images, ©Roger Leo/Index Stock Imagery,Jerry Young/©DK Images, Daniel J. Cox/Daniel J. Cox/Natural Exposures,©Frans Lanting/Minden Pictures, ©Manfred Danegger/Photo Researchers,Inc., ©Zigmund Leszczynski/Animals Animals/Earth Scenes, ©Michael andPatricia Fogden/Corbis, Alan G. Nelson/Animals Animals/Earth Scenes,©Sumio Harada/Minden Pictures, ©John Stern/Animals Animals/Earth ScenesQuestion 5 ©The Image Bank/Getty Images, ©HollyHarris/Getty Images, ©Taxi/Getty Images, ©Richard Megna/FundamentalPhotographs, Dave King/Pitt Rivers Museum/University of Oxford,Oxford/©DK Images, ©DK Images, ©Gary W. Carter/Corbis, ©RolfKopfle/Bruce Coleman Inc., ©DK Images, ©Tom Uhlman/Visuals Unlimited,©DK Images, ©Arnulf Husmo/Getty Images5 ©Joseph Sohm/ChromoSohmInc./Corbis, ©GSFC/NASA Image Exchange, ©JPL/NASA, ©ArielSkelley/Corbis Question 6 ©Julie Eggers/BruceColeman Inc., ©Steve Solum/Bruce Coleman Inc., ©Comstock Inc.,©Stone/Getty Images, ©Doug Scott/Age Fotostock, ©DK Images, ©Andrew J.Martinez/Photo Researchers, Inc., ©Ralph White/Corbis, ©DK Images, AndyCrawford/©DK Images, Getty Images, ©John Sanford/Photo Researchers,Inc., Adam Benton, ©NOAO/Gatley Merrill/Ressmeyer/Corbis Question 7 Corbis, ©Comstock Inc., Getty Images, ©/Corbis, ©MacduffEverton/Corbis, ©E. Braverman/Getty Images, ©Raymond Gehman/NGS ImageCollection, ©Cornelia Doerr/Age Fotostock, G. Li Causi/A.Ricciardi/A.Garatti/Alessandro Vannini, Rome , Italy Question 8 ©Boden/Ledingham/Masterfile Corporation, ©Lester Lefkowitz/Corbis, ©Andrew Brown; Ecoscene/Corbis, ©Tom Bean/DRK Photo Question 9 ©Tom Uhlman/Visuals Unlimited, Digital Vision, ©Indianapolis Star,Frank Espich/AP/Wide World Photos, ©Hulton-Deutsch Collection/Corbis,DK Images, ©Joseph Van Os/Getty Images, ©Roger Ressmeyer/Corbis Question 10 ©Terry Renna/AP/Wide World Photos, ©David Vaughan/Photo Researchers,Inc., Photo Library, ©DK Images, Royal Museum of Scotland /©DK Images,©Roger Wilmshurst; Frank Lane Picture Agency/Corbis, (C) Getty Images,©Doug Sokell/Visuals Unlimited, ©NOAO/Gatley Merrill/Ressmeyer/Corbis

Interactive Presentation Software Credits
08_g1_ch01_mathinscience.flp: 20 (TL) ©Frank Lukasseck/Zefa/Corbis, (TR) ©Christine Schneider/Zefa/Corbis, (B) ©Don Mason/Corbis, (CL) ©IPS Co., Ltd./Beateworks; 21 (T,B) ©Royalty-Free/Corbis, (TC) ©DLILLC/Corbis; 08_g1_ch01_youarethere.flp: ©Pat O’Hara/Corbis; 08_g1_ch02_guidedinquiry.flp: ©Yva Momatiuk/John Eastcott/Minden Pictures, (TR) ©Gerry Ellis/Minden Pictures; 08_g1_ch02_mathinscience.flp: 42 (BC) ©Nigel J.Dennis/NHPA Limited, (T) ©Art Wolfe/ Stone/Getty Images; 08_g1_ch02_youarethere.flp: ©W. Perry Conway/Corbis; 08_g1_ch03_lesson4.flp: 70 (BR) ©Tom & Pat Leeson/Photo Researchers, Inc., (CL) Getty Images, (TL, CR) ©DK Images, (BL) ©Alan and Sandy Carey/Getty Images; 71 (CL) ©John Eastcott and Yva Momatiuk/NGS Image Collection, (BL) ©Ed Reschke/Peter Arnold, Inc., (CR, BR) ©DK Images; 08_g1_ch03_mathinscience.flp: 76 (Bkgd) ©Arctic National Wildlife Refuge/Getty Images, (CR) ©Art Wolfe/Getty Images, (B) ©S. Purdy Matthews/Stone/Getty Images; 77 (CR) ©Virginia Neefus/Animals Animals/Earth Scenes, (TR, BR) ©DK Images, (CR) ©Stephen Krasemann/Stone, (CC) ©Helen Williams/Photo Researchers, Inc.; 08_g1_ch03_youarethere.flp: David Fritts/Stone/Getty Images; 08_g1_ch04_youarethere.flp: ©Stephen Dalton/NHPA Limited; 08_g1_ch05_mathinscience.flp: 132 (TC) ©Michael & Patricia Fogden/Corbis, (C) ©John Shaw/Tom Stack & Associates, Inc.; 133 (TL) ©Michael & Patricia Fogden/Corbis, (CL) ©John Gerlach/ Visuals Unlimited, (C) ©Tim Wright/ Corbis, (C) ©William J. Weber/Visuals Unlimited, (CR) Getty Images, (CR) ©Michael Sewell/Peter Arnold, Inc., (CL) ©DK Images; 08_g1_ch05_youarethere.flp: ©Michael & Patricia Fogden/Corbis; 08_g1_ch06_howtoread.flp: 149 (Bkgd) ©Richard Price/Getty Images, (C) NASA; 08_g1_ch06_mathinscience.flp: 170 ©Stone/Getty Images; 08_g1_ch06_youarethere.flp: ©Richard Price/Getty Images; 08_g1_ch07_howtoread.flp: 81 (TR) ©Stephen Oliver/©DK Images, (C) ©Bob Burch/Index Stock Imagery, (Bkgd) ©Marc Muench/Corbis; 08_g1_ch07_mathinscience.flp: 196 (C, CL) Getty Images; 197 (R, C, CL, CR) ©Bruce Peebles/Corbis; 08_g1_ch07_youarethere.flp: ©Marc Muench/Corbis; 08_g1_ch08_lesson2.flp: ©DK Images, ©DK Images, ©DK Images; 08_g1_ch08_mathinscience.flp: 234 ©Dan Gair/Index Stock Imagery; 08_g1_ch09_howtoread.flp: 245 Getty Images; 08_g1_ch09_mathinscience.flp: 268 (CL) Digital Vision, (C) Getty Images, (C) ©DK Images, (BC) ©Ron Kimball/PhotoLibrary, ©Comstock, Inc.; 269 (CL) ©Allsport Concepts/Getty Images, (C) ©Dean Abramson/Stock Boston, (CR) ©Johnson Space Center/NASA, (BC) ©Ron Kimball/PhotoLibrary, (C) Getty Images; 08_g1_ch09_youarethere.flp: Getty Images; 08_g1_ch10_howtoread.flp: 277 (Bkgd) ©Jose Fuste Raga/Corbis, ©David Brooke/Corbis; 08_g1_ch10_youarethere.flp: ©Onne van der Wal/Corbis; 08_g1_ch11_howtoread.flp: 317 (C) NASA, (Bkgd) ©John McAnulty/Corbis, (TR) NASA Image Exchange; 08_g1_ch11_mathinscience.flp: 330 (C) ©Stone/ Getty Images, (CR, BR) Getty Images; 08_g1_ch11_youarethere.flp: ©John McAnulty/Corbis; 08_g1_ch12_howtoread.flp: NO CREDIT LISTED; 08_g1_ch12_youarethere.flp: ©Randy Wells/Corbis; 08_g1_ua_testtalk.flp: No CREDITS LISTED; 08_g1_ua_wrapup.flp: ©Pat O’Hara/Corbis, ©Mary Kate Denny/PhotoEdit, ©W. Perry Conway/Corbis, David Fritts/Stone/Getty Images, ©Stephen Dalton/NHPA Limited, ©Michael & Patricia Fogden/Corbis; 08_g1_ub_wrapup.flp: ©Richard Price/Getty Images, ©Marc Muench/Corbis; 08_g1_uc_testtalk.flp: ©Dave King/DK Images; 08_g1_uc_wrapup.flp: Getty Images, ©Onne van der Wal/Corbis; 08_g1_ud_testtalk.flp: Corbis; 08_g1_ud_wrapup.flp: ©John McAnulty/Corbis, Getty Images.

Interactive Presentation Software Credits - Florida
fl_ch01_mathinscience.flp: 20 (TL) ©Frank Lukasseck/Zefa/Corbis, (TR) ©Christine Schneider/Zefa/Corbis, (B) ©Don Mason/Corbis, (CL) ©IPS Co., Ltd./Beateworks; 21 (T,B) ©Royalty-Free/Corbis, (TC) ©DLILLC/Corbis; fl_ch01_youarethere.flp: ©Pat O’Hara/Corbis; fl_ch02_guidedinquiry.flp: ©Yva Momatiuk/John Eastcott/Minden Pictures, (TR) ©Gerry Ellis/Minden Pictures; fl_ch02_mathinscience.flp: 42 (BC) ©Nigel J.Dennis/NHPA Limited, (T) ©Art Wolfe/ Stone/Getty Images; fl_ch02_youarethere.flp: ©W. Perry Conway/Corbis; fl_ch03_lesson4.flp: 70 (BR) ©Tom & Pat Leeson/Photo Researchers, Inc., (CL) Getty Images, (TL, CR) ©DK Images, (BL) ©Alan and Sandy Carey/Getty Images; 71 (CL) ©John Eastcott and Yva Momatiuk/NGS Image Collection, (BL) ©Ed Reschke/Peter Arnold, Inc., (CR, BR) ©DK Images; fl_ch03_mathinscience.flp: 76 (Bkgd) ©Arctic National Wildlife Refuge/Getty Images, (CR) ©Art Wolfe/Getty Images, (B) ©S. Purdy Matthews/Stone/Getty Images; 77 (CR) ©Virginia Neefus/Animals Animals/Earth Scenes, (TR, BR) ©DK Images, (CR) ©Stephen Krasemann/Stone, (CC) ©Helen Williams/Photo Researchers, Inc.; fl_ch03_youarethere.flp: David Fritts/Stone/Getty Images; fl_ch04_youarethere.flp: ©Stephen Dalton/NHPA Limited; fl_ch05_mathinscience.flp: 132 (TC) ©Michael & Patricia Fogden/Corbis, (C) ©John Shaw/Tom Stack & Associates, Inc.; 133 (TL) ©Michael & Patricia Fogden/Corbis, (CL) ©John Gerlach/ Visuals Unlimited, (C) ©Tim Wright/ Corbis, (C) ©William J. Weber/Visuals Unlimited, (CR) Getty Images, (CR) ©Michael Sewell/Peter Arnold, Inc., (CL) ©DK Images; fl_ch05_youarethere.flp: ©Michael & Patricia Fogden/Corbis; fl_ch06_howtoread.flp: 149 (Bkgd) ©Richard Price/Getty Images, (C) NASA; fl_ch06_mathinscience.flp: 170 ©Stone/Getty Images; fl_ch06_youarethere.flp: ©Richard Price/Getty Images; fl_ch07_howtoread.flp: 81 (TR) ©Stephen Oliver/©DK Images, (C) ©Bob Burch/Index Stock Imagery, (Bkgd) ©Marc Muench/Corbis; fl_ch07_mathinscience.flp: 196 (C, CL) Getty Images; 197 (R, C, CL, CR) ©Bruce Peebles/Corbis; fl_ch07_youarethere.flp: ©Marc Muench/Corbis; fl_ch08_lesson2.flp: ©DK Images, ©DK Images, ©DK Images; fl_ch08_mathinscience.flp: 234 ©Dan Gair/Index Stock Imagery; fl_ch09_howtoread.flp: 245 Getty Images; fl_ch09_mathinscience.flp: 268 (CL) Digital Vision, (C) Getty Images, (C) ©DK Images, (BC) ©Ron Kimball/PhotoLibrary, ©Comstock, Inc.; 269 (CL) ©Allsport Concepts/Getty Images, (C) ©Dean Abramson/Stock Boston, (CR) ©Johnson Space Center/NASA, (BC) ©Ron Kimball/PhotoLibrary, (C) Getty Images; fl_ch09_youarethere.flp: Getty Images; fl_ch10_howtoread.flp: 277 (Bkgd) ©Jose Fuste Raga/Corbis, ©David Brooke/Corbis; fl_ch10_youarethere.flp: ©Onne van der Wal/Corbis; fl_ch11_howtoread.flp: 317 (C) NASA, (Bkgd) ©John McAnulty/Corbis, (TR) NASA Image Exchange; fl_ch11_mathinscience.flp: 330 (C) ©Stone/ Getty Images, (CR, BR) Getty Images; fl_ch11_youarethere.flp: ©John McAnulty/Corbis; fl_ch12_howtoread.flp: NO CREDIT LISTED; fl_ch12_youarethere.flp: ©Randy Wells/Corbis; fl_ua_testtalk.flp: No CREDITS LISTED; fl_ua_wrapup.flp: ©Pat O’Hara/Corbis, ©Mary Kate Denny/PhotoEdit, ©W. Perry Conway/Corbis, David Fritts/Stone/Getty Images, ©Stephen Dalton/NHPA Limited, ©Michael & Patricia Fogden/Corbis; fl_ub_wrapup.flp: ©Richard Price/Getty Images, ©Marc Muench/Corbis; fl_uc_testtalk.flp: ©Dave King/DK Images; fl_uc_wrapup.flp: Getty Images, ©Onne van der Wal/Corbis; fl_ud_testtalk.flp: Corbis; fl_ud_wrapup.flp: ©John McAnulty/Corbis, Getty Images.

Grade 2

Active Glossary Credits
bird: Don Enger/Animals Animals/Earth Scenes; boulder : ©Jeremy Homer/Corbis; camouflage :Stephen Krasemann/Stone, T. Kitchin and V. Hurst/NHPA Limited, ©RichardK. LaVal/Animals Animals/Earth Scenes, Corbis, ©D. Robert & LorriFranz/Corbis, Jean-Louis LeMoigne/NHPA Limited; constellation : ©Roger Ressmeyer/Corbis; consumer : Peter Johnson/Corbis; crater : NASA Image Exchange; dinosaur : ©DK Images; environment : Melissa Farlow/Aurora & Quanta Productions, ©DK Images, ©Kurt Stier/Corbis; fish : ©Taxi/Getty Images; flower : Corbis; food chain : Neil Fletcher and Matthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/Getty Images; food web :©DK Images, ©Michael Sewell/Peter Arnold, Inc., Neil Fletcher andMatthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/GettyImages, ©Tom Shaw/Tom Stack & Associates, Inc., Getty Images,Michael Quinton/Minden Pictures; fossil : Alan Male; fuel : ©Holly Harris/Getty Images; germinate : ©Nigel Cattlin/Photo Researchers, Inc.; gills : ©Taxi/Getty Images; hibernate : ©Marty Stoufer/Animals Animals/Earth Scenes; insect : ©DK Images; invent : ©Bettmann/Corbis, The Granger Collection, NY; leaves : ©DK Images; life cycle : ©DK Images; lightning : Greg Harris; mammal : ©Joe McDonald/Corbis; manufacture : ©Peter Yates/Corbis; migrate : ©Joseph H. Bailey/NGS Image Collection; mineral : ©DK Images, Natural History Museum/©DK Images, Colin Keates/Courtesy of Natural History Museum/©DK Images; natural resource : ©D. Boone/Corbis, ©Jim Brandenburg/Minden Pictures, ©Joseph Sohm/ChromoSohm, Inc./Corbis; nutrients : ©G.I. Bernard/Animals Animals/Earth Scenes ; nymph : ©Robert Thompson/NHPA Limited; paleontologist : ©Richard T. Nowitz/Corbis; phase : ©John Sanford/Photo Researchers, Inc.; pollution : Getty Images; predator : ©William Bernard/Corbis, ©Gail Shumway/Getty Images; prey : Jane Burton/©DK Images, ©Daniel Cox/Getty Images; producer : ©Randy Morse/Animals Animals/Earth Scenes; recycle : ©Royalty-Free/Corbis, ©Pete Soloutus/Corbis, ©Eric Fowke/PhotoEdit; reptile : ©Joe McDonald/Corbis; sand : ©DK Images; satellite: ©David Ducros/Photo Researchers, Inc.; seed coat : ©DK Images; seedling : Derek Hall/©DK Images; solar energy : ©Kevin Burke/Getty Images; solar system : ©NASA/Photo Researchers, Inc.; source : ©Maxine Hall/Corbis, ©Adina Tovy/Robert Harding Picture Library Ltd.; stem : ©DK Images; technology :Peter Anderson/©DK Images, ©Science Museum/Science & SocietyPicture Library, Getty Images, Stepen Oliver/©DK Images, ©AppleComputers, Inc.; transportation : ©Giulio Andreini; vaccine : ©Steve Raymer/Corbis; water cycle : Peter Bollinger; weathering : Natural History Museum/©DK Images, ©Jeremy Horner/Corbis.

Active Glossary Credits - California
answer questions : ©DK Images; background : ©Roy Ooms/Masterfile Corporation; caterpillar : ©Michael and Patricia Fogden/Corbis; dinosaur : ©DK Images; draw conclusions : ©The Image Bank/Getty Images; environment : Melissa Farlow/Aurora & Quanta Productions, ©DK Images, ©Kurt Stier/Corbis; fossil : Alan Male; fuel : ©Holly Harris/Getty Images; germinate : ©Nigel Cattlin/Photo Researchers, Inc.; granite : ©DK Images; inherit: ©Manoj Shah/Animals Animals /Earth Scenes; insect : ©DK Images; larva : ©Michael and Patricia Fogden/Corbis; life cycle : ©DK Images; luster : ©DK Images; machine : Getty Images; mammal : ©Joe McDonald/Corbis; minerals : ©DK Images, Natural History Museum/©DK Images, Colin Keates/Courtesy of Natural History Museum/©DK Images; natural resources : ©D. Boone/Corbis, ©Jim Brandenburg/Minden Pictures, ©Joseph Sohm/ChromoSohm, Inc./Corbis; nutrient: ©G.I. Bernard/Animals Animals/Earth Scenes ; nymph : ©Robert Thompson/NHPA Limited; observe: ©Darrell Guilin/Corbis; offspring : ©Manoj Shah/Animals Animals /Earth Scenes; pollen : DK Images, ©Steve Maslowski/Photo Researchers, Inc., ©Susumu Nishinaga/Photo Researchers, Inc.; position : ©David Young-Wolff/PhotoEdit; predict : ©Roy Rainford/Robert Harding Picture Library, Ltd.; pupa : ©George D. Lepp/Corbis; purpose: ©DK Images; rock: ©J. Eastcott Film/NGS Image Collection; seed : ©DK Images; seed coat : ©DK Images; seedling : Derek Hall/©DK Images; soil : Clive Streeter/©DK Images, ©DK Images; stage : ©Stephen Dalton/NHPA Limited, George Bernard/NHPA Limited, Getty Images; stem : ©DK Images; tadpole : ©DK Images; weathering : Natural History Museum/©DK Images, ©Jeremy Horner/Corbis.

Active Art
Solar System: ©GettyImages, Mariner 10/NASA, Pioneer Venus Orbiter/NASA, VoyagerI/NASA/NSSDC, NASA and the Hubble Heritage Team (STScl/AURA)/HubbleSpace Telescope WFPC2/STScl-PRC01-15, NASA/NSSDC (Image Processing byJody Swann/Tammy Becker/Alfred McEwen using the PICS [Planetary ImageCartography System] image processing system developed at the U.S.Geological Survey in Flagstaff, Arizona), Apollo 17 Crew/NASA, E.Karkoschka et al. (University of Arizona)/NICMOS/HST/NASA, Dr. R.Albrecht (ESA/ESO)/NASA, Voyager II/NASA.
Observing Objects:©Getty Images, Mariner 10/NASA, Pioneer Venus Orbiter/NASA, VoyagerI/NASA/NSSDC, NASA and the Hubble Heritage Team (STScl/AURA)/HubbleSpace Telescope WFPC2/STScl-PRC01-15, NASA/NSSDC (Image Processing byJody Swann/Tammy Becker/Alfred McEwen using the PICS [Planetary ImageCartography System] image processing system developed at the U.S.Geological Survey in Flagstaff, Arizona)

Games
Nanoboy: Courtesy IBM Corporation. Carbon illustrations, Tony Randazzo. Name That Mineral!: DK Images, Colin Keates/Courtesy of the Natural History Museum, London/DK Images. Build a Food Web:DK Images, Stephen Krasemann/NHPA Limited, Jim Zipp/Photo Researchers,Inc., Joe McDonald/Corbis, © Royalty-Free/Corbis, ©Gail Shumway/GettyImages. Ecosystems: ©J. Eastcott/Y. Eastcott Film/NGSImage Collection, ©Enzo & Paolo Ragazzini/Corbis, ©AndyBinns/Ecoscene, ©Jim Zipp/Photo Researchers, Inc.

Active Glossary Credits - Spanish
ambiente : Melissa Farlow/Aurora & Quanta Productions, ©DK Images, ©Kurt Stier/Corbis; arena : ©DK Images; ave : Don Enger/Animals Animals/Earth Scenes; branquias : ©Taxi/Getty Images; cadena alimentaria : Neil Fletcher and Matthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/Getty Images; camuflaje :Stephen Krasemann/Stone, T. Kitchin and V. Hurst/NHPA Limited, ©RichardK. LaVal/Animals Animals/Earth Scenes, Corbis, ©D. Robert & LorriFranz/Corbis, Jean-Louis LeMoigne/NHPA Limited; ciclo de vida: ©DK Images; ciclo del agua : Peter Bollinger; combustible : ©Holly Harris/Getty Images; constelación : ©Roger Ressmeyer/Corbis; consumidor : Peter Johnson/Corbis; contaminación : Getty Images; cráter : NASA Image Exchange; dinosaurio : ©DK Images; energía solar : ©Kevin Burke/Getty Images; envoltura de la semilla : ©DK Images; fase : Paul Oglesby; flor : Corbis; fósil : Alan Male; fuente : ©Maxine Hall/Corbis, ©Adina Tovy/Robert Harding Picture Library Ltd.; germinar : ©Nigel Cattlin/Photo Researchers, Inc.; hibernar : ©Marty Stoufer/Animals Animals/Earth Scenes; hoja : ©DK Images; insecto : ©DK Images; inventar : ©Bettmann/Corbis, The Granger Collection, NY; mamífero : ©Joe McDonald/Corbis; manufacturar : ©Peter Yates/Corbis; meteorización : Natural History Museum/©DK Images, ©Jeremy Horner/Corbis; migrar : ©Joseph H. Bailey/NGS Image Collection; mineral : ©DK Images, Natural History Museum/©DK Images, Colin Keates/Courtesy of Natural History Museum/©DK Images; ninfa : ©Robert Thompson/NHPA Limited; nutrientes : ©G.I. Bernard/Animals Animals/Earth Scenes ; paleontólogo : ©Richard T. Nowitz/Corbis; peña : ©Jeremy Homer/Corbis; pez : ©Taxi/Getty Images; plántula : Derek Hall/©DK Images; pradera : ©Richard Hamilton Smith/Corbis; predador : ©William Bernard/Corbis, ©Gail Shumway/Getty Images; presa : Jane Burton/©DK Images, ©Daniel Cox/Getty Images; productor : ©Randy Morse/Animals Animals/Earth Scenes; rayo: Greg Harris; reciclar : ©Royalty-Free/Corbis, ©Pete Soloutus/Corbis, ©Eric Fowke/PhotoEdit; recurso natural : ©D. Boone/Corbis, ©Jim Brandenburg/Minden Pictures, ©Joseph Sohm/ChromoSohm, Inc./Corbis; red alimentaria :©DK Images, ©Michael Sewell/Peter Arnold, Inc., Neil Fletcher andMatthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/GettyImages, ©Tom Shaw/Tom Stack & Associates, Inc., Getty Images,Michael Quinton/Minden Pictures; reptil : ©Joe McDonald/Corbis; satélite : ©David Ducros/Photo Researchers, Inc.; sistema solar : ©NASA/Photo Researchers, Inc.; tallo : ©DK Images; tecnología :Peter Anderson/©DK Images, ©Science Museum/Science & SocietyPicture Library, Getty Images, Stepen Oliver/©DK Images, ©AppleComputers, Inc.; transporte : ©Giulio Andreini; vacuna : ©Steve Raymer/Corbis.

Science Games
Question 1 ©The Image Bank/Getty Images, ©DK Images,Geoff Moon/Frank Lane Picture Agency/Corbis, ©Ric Ergenbright/Corbis,Getty Images, ©Michael & Patricia Fogden/Corbis, ©John Lund/Corbis,©G. Renner/Robert Harding Picture Library Ltd., ©Robb DeWall, ©SteveMaslowski/Photo Researchers, Inc., Jerry Young/©DK Images, GettyImages, Brand X Pictures, ©Tony Freeman/PhotoEdit, ©David Parker/PhotoResearchers, Inc., ©Kaz Mori/Getty Images, ©Dan Chung/Reuters/Landov,LLC, ©Ron Thomas/Getty Images, ©Gerald L. Kooyman/Animals Animals/EarthScenes, The Granger Collection, NY, (TR) ©Bruce Burkhardt/Corbis Question 2 ©Taxi/Getty Images, ©Royalty-Free/Corbis, Getty Images, ©William J.Weber/Visuals Unlimited, ©Ted Levin/Animals Animals/Earth Scenes,©Garry Black/Masterfile Corporation, Daniel J. Cox/NaturalExposures.com, ©David Ulmer/Stock Boston, ©Claus Meyer/Minden Pictures,©Yva Momatiuk/John Eastcott/Minden Pictures, ©Paul Almasy/Corbis, ©AlanSchein Photography/Corbis, ©Royalty-Free/Corbis, ©David Paynter/AgeFotostock Question 3 ©J. & B.Photographers/Animals Animals/Earth Scenes, S. PurdyMatthews/Stone/Getty Images, Alan G. Nelson/Animals Animals/EarthScenes, ©Taxi/Getty Images, ©Brand X Pictures/Getty Images, ©The ImageBank/Getty Images, Flip Nicklin/Minden Pictures, ©Carol Havens/Corbis,©Leonard Lessin/Peter Arnold, Inc., ©DK Images, Stephen Frink/Corbis,©Paulo De Oliviera/Animals Animals/Earth Scenes, ©DK Images,©Fotopic/Index Stock Imagery, ©Jose Fuste Raga/eStock Photo,©Duomo/Corbis, Getty Images, Bob Langrish/©DK Images, ©KevinAitken/Peter Arnold, Inc., ©Chris Newbert/Minden Pictures Question 4 ©Tom Brakefield/Corbis, ©Mark L. Stephenson/Corbis, Courtesy of theLondon Toy and Model Museum, Paddington, London/©DK Images, DK Images,Pete Atkinson/NHPA Limited, ©James Watt/Animals Animals/Earth Scenes,Kent Wood/Photo Researchers, Inc., ©Joe McDonald/Corbis, ©RodPlanck/Photo Researchers, Inc., ©Royalty-Free/Corbis, ©RogerRessmeyer/Corbis, ©/Corbis, ©Tom Bean/Corbis, ©YannArthus-Bertrand/Corbis, Getty Images, ©Roger Leo/Index Stock Imagery,Jerry Young/©DK Images, Daniel J. Cox/Daniel J. Cox/Natural Exposures,©Frans Lanting/Minden Pictures, ©Manfred Danegger/Photo Researchers,Inc., ©Zigmund Leszczynski/Animals Animals/Earth Scenes, ©Michael andPatricia Fogden/Corbis, Alan G. Nelson/Animals Animals/Earth Scenes,©Sumio Harada/Minden Pictures, ©John Stern/Animals Animals/Earth ScenesQuestion 5 ©The Image Bank/Getty Images, ©HollyHarris/Getty Images, ©Taxi/Getty Images, ©Richard Megna/FundamentalPhotographs, Dave King/Pitt Rivers Museum/University of Oxford,Oxford/©DK Images, ©DK Images, ©Gary W. Carter/Corbis, ©RolfKopfle/Bruce Coleman Inc., ©DK Images, ©Tom Uhlman/Visuals Unlimited,©DK Images, ©Arnulf Husmo/Getty Images5 ©Joseph Sohm/ChromoSohmInc./Corbis, ©GSFC/NASA Image Exchange, ©JPL/NASA, ©ArielSkelley/Corbis Question 6 ©Julie Eggers/BruceColeman Inc., ©Steve Solum/Bruce Coleman Inc., ©Comstock Inc.,©Stone/Getty Images, ©Doug Scott/Age Fotostock, ©DK Images, ©Andrew J.Martinez/Photo Researchers, Inc., ©Ralph White/Corbis, ©DK Images, AndyCrawford/©DK Images, Getty Images, ©John Sanford/Photo Researchers,Inc., Adam Benton, ©NOAO/Gatley Merrill/Ressmeyer/Corbis Question 7 Corbis, ©Comstock Inc., Getty Images, ©/Corbis, ©MacduffEverton/Corbis, ©E. Braverman/Getty Images, ©Raymond Gehman/NGS ImageCollection, ©Cornelia Doerr/Age Fotostock, G. Li Causi/A.Ricciardi/A.Garatti/Alessandro Vannini, Rome , Italy Question 8 ©Boden/Ledingham/Masterfile Corporation, ©Lester Lefkowitz/Corbis, ©Andrew Brown; Ecoscene/Corbis, ©Tom Bean/DRK Photo Question 9 ©Tom Uhlman/Visuals Unlimited, Digital Vision, ©Indianapolis Star,Frank Espich/AP/Wide World Photos, ©Hulton-Deutsch Collection/Corbis,DK Images, ©Joseph Van Os/Getty Images, ©Roger Ressmeyer/Corbis Question 10 ©Terry Renna/AP/Wide World Photos, ©David Vaughan/Photo Researchers,Inc., Photo Library, ©DK Images, Royal Museum of Scotland /©DK Images,©Roger Wilmshurst; Frank Lane Picture Agency/Corbis, (C) Getty Images,©Doug Sokell/Visuals Unlimited, ©NOAO/Gatley Merrill/Ressmeyer/Corbis

Interactive Presentation Software Credits
08_g2_ch01_howtoread.flp: 5 (Bkgd) Corbis, (TR) ©Stephen Dalton/NHPA Limited, (CL) ©Eric Crichton/Corbis; 08_g2_ch01_mathinscience.flp: 28 (CL, BL) Matthew Ward/©DK Images, (T) Hemera Technologies; 29 ©Klein/Hubert/Peter Arnold, Inc.; 08_g2_ch01_youarethere.flp: Corbis; 08_g2_ch02_howtoread.flp: 37 (Bkgd) ©Alan G. Nelson/Animals Animals/Earth Scenes, (TR) Brand X Pictures, (CL) ©Breck P. Kent/Animals Animals/ Earth Scenes, (BCL) ©Joe McDonald/Animals Animals/Earth Scenes; 08_g2_ch02_mathinscience.flp: 58 (C, BC, BR) ©DK Images, (BL) ©Royalty-Free/Corbis, (CL) ©Carmela Leszczynski/Animals Animals/Earth Scenes; 59 (BL) ©DK Images, (BR) ©Daniel Heuclin/NHPA Limited; 08_g2_ch02_youarethere.flp: ©Alan G. Nelson/Animals Animals /Earth Scenes; 08_g2_ch03_howtoread.flp: 69 (Bkgd) ©Clem Haagner/Gallo Images/Corbis, (TR) Getty Images; 08_g2_ch03_lesson3.flp: 80 (TC) ©James Watt/Animals Animals/Earth Scenes, (BR) ©Andrew J. Martinez/Photo Researchers, Inc., (CR) ©Stephen Frink/Corbis, (CL) ©Randy Morse/Animals Animals/Earth Scenes, (TL) ©Andrew J. Martinez/Photo Researchers, Inc.; 81 (T) ©Amos Nachoum/Corbis, (CR) ©Sanford/Agliolo/Corbis, (BC) ©Steve Bein/Corbis; 08_g2_ch03_mathinscience.flp: 92 (TR) ©Joe McDonald/Corbis, (BR) ©D. Robert and Lorri Franz/ Corbis, (BL) Frank Greenaway/©DK Images, (Bkgd) ©William Manning/Corbis, (BL) Getty Images, (CL) Jane Burton/©DK Images; 08_g2_ch03_youarethere.flp: Clem Haagner/Gallo Images/Corbis; 08_g2_ch04_howtoread.flp: (TR) ©Paul A. Sounders/Corbis, (CL) ©Royalty-Free/Corbis, (CR) ©David Young Wolff/PhotoEdit; 08_g2_ch04_lesson7.flp: ©DK Images; 08_g2_ch04_mathinscience.flp: 124 (C) ©Albert Normandin/Masterfile Corporation, (B) ©DK Images, (CC) Getty Images, (C) ©Michael Newman/PhotoEdit, (CL) ©Robert Pickett/Corbis, (BL) ©Richard Shiell/Animals Animals/Earth Scenes, (BR) ©Kevin Schafer/Corbis; 125 (BL) ©DK Images, (CL) ©Stephen Dalton/NHPA Limited, (BL) ©George Bernard/NHPA Limited, (CC) Getty Images; 08_g2_ch04_youarethere.flp: ©Tom Brakefield/Corbis; 08_g2_ch05_howtoread.flp: (TR) ©Stone/Getty Images, (C) ©David M. Dennis/Animals Animals/Earth Scenes; 08_g2_ch05_youarethere.flp: ©DK Images; 08_g2_ch06_howtoread.flp: ©Alan. R. Moller/Getty Images; 08_g2_ch06_youarethere.flp: ©Otto Rogge/Corbis, (Bkgd) ©Bill Ross/Corbis; 08_g2_ch07_howtoread.flp: Colin Keates/©DK Images; 08_g2_ch07_mathinscience.flp: 220 (Bkgd) ©Pat O'Hara/Corbis, (TL, BR) ©James L. Amos/Corbis, (CL) ©George H. H. Huey/ Corbis, (BL) Colin Keates/Natural History Museum/©DK Images; 221 ©Lowell Georgia/Corbis; 222 (T, CR) ©DK Images, (CL) ©Richard T. Nowitz/Corbis, (BR) ©Layne Kennedy/Corbis; 08_g2_ch07_youarethere.flp: ©Richard T. Nowitz/Corbis; 08_g2_ch08_howtoread.flp: Getty Images; 08_g2_ch09_howtoread.flp: ©Jim Cummins/Corbis; 08_g2_ch09_mathinscience.flp: ©Bryn Colton/Assignments Photographers/Corbis; 08_g2_ch09_youarethere.flp: ©Jim Cummins/Corbis; 08_g2_ch10_howtoread.flp: Getty Images; 08_g2_ch10_youarethere.flp: (C) Getty Images, (Bkgd) ©Paul Barton/Corbis; 08_g2_ch11_howtoread.flp: (Bkgd) ©Thinkstock, (C) ©Tom & Dee Ann McCarthy/ Corbis; 08_g2_ch11_mathinscience.flp: ©Tom Tracy/Corbis; 08_g2_ch11_youarethere.flp: ©Thinkstock; 08_g2_ch12_howtoread.flp: (Bkgd) ©Roger Tidman/Corbis, (TR) Getty Images; 08_g2_ch12_mathinscience.flp: ©Scott Tysick/ Masterfile Corporation; 08_g2_ch12_youarethere.flp: ©Roger Tidman/Corbis; 08_g2_ch13_howtoread.flp: (TR) ©Stone/Getty Images, (CL) ©DK Images, (Bkgd) ©Retuters/Corbis; 08_g2_ch13_mathinscience.flp: 412 ©Michael Newman/PhotoEdit; 413 (TC) ©Royalty-Free/Corbis, (CR) ©LWA-Dann Tardif/Corbis, (BL) ©Ariel Skelley/Corbis, (TL) ©Hutchings Stock Photography/Corbis; 08_g2_ch13_youarethere.flp: ©Reuters/Corbis; 08_g2_ua_wrapup.flp: (BL) ©Tom Brakefield/Corbis, (TCL) ©Alan G. Nelson/Animals Animals/Earth Scenes, (TL) Corbis, (CL) ©Clem Haagner/Gallo Images/Corbis; 08_g2_ub_wrapup.flp: ©DK Images, ©Otto Rogge/Corbis, ©DK Images; 08_g2_uc_testtalk.flp: PhotoLibrary; 08_g2_uc_wrapup.flp: (BCL) ©Paul Barton/Corbis, (BL) ©Thinkstock, (CL) ©Jim Cummins/Corbis, (CL) Getty Images; 08_g2_ud_testtalk.flp: ©Arthur Tilley/Getty Images; 08_g2_ud_wrapup.flp: ©Roger Tidman/Corbis.

Interactive Presentation Software Credits - Florida
fl_ch01_howtoread.flp: 5 (Bkgd) Corbis, (TR) ©Stephen Dalton/NHPA Limited, (CL) ©Eric Crichton/Corbis; fl_ch01_mathinscience.flp: 28 (CL, BL) Matthew Ward/©DK Images, (T) Hemera Technologies; 29 ©Klein/Hubert/Peter Arnold, Inc.; fl_ch01_youarethere.flp: Corbis; fl_ch02_howtoread.flp: 37 (Bkgd) ©Alan G. Nelson/Animals Animals/Earth Scenes, (TR) Brand X Pictures, (CL) ©Breck P. Kent/Animals Animals/ Earth Scenes, (BCL) ©Joe McDonald/Animals Animals/Earth Scenes; fl_ch02_mathinscience.flp: 58 (C, BC, BR) ©DK Images, (BL) ©Royalty-Free/Corbis, (CL) ©Carmela Leszczynski/Animals Animals/Earth Scenes; 59 (BL) ©DK Images, (BR) ©Daniel Heuclin/NHPA Limited; fl_ch02_youarethere.flp: ©Alan G. Nelson/Animals Animals /Earth Scenes; fl_ch03_howtoread.flp: 69 (Bkgd) ©Clem Haagner/Gallo Images/Corbis, (TR) Getty Images; fl_ch03_lesson3.flp: 80 (TC) ©James Watt/Animals Animals/Earth Scenes, (BR) ©Andrew J. Martinez/Photo Researchers, Inc., (CR) ©Stephen Frink/Corbis, (CL) ©Randy Morse/Animals Animals/Earth Scenes, (TL) ©Andrew J. Martinez/Photo Researchers, Inc.; 81 (T) ©Amos Nachoum/Corbis, (CR) ©Sanford/Agliolo/Corbis, (BC) ©Steve Bein/Corbis; fl_ch03_mathinscience.flp: 92 (TR) ©Joe McDonald/Corbis, (BR) ©D. Robert and Lorri Franz/ Corbis, (BL) Frank Greenaway/©DK Images, (Bkgd) ©William Manning/Corbis, (BL) Getty Images, (CL) Jane Burton/©DK Images; fl_ch03_youarethere.flp: Clem Haagner/Gallo Images/Corbis; fl_ch04_howtoread.flp: (TR) ©Paul A. Sounders/Corbis, (CL) ©Royalty-Free/Corbis, (CR) ©David Young Wolff/PhotoEdit; fl_ch04_lesson7.flp: ©DK Images; fl_ch04_mathinscience.flp: 124 (C) ©Albert Normandin/Masterfile Corporation, (B) ©DK Images, (CC) Getty Images, (C) ©Michael Newman/PhotoEdit, (CL) ©Robert Pickett/Corbis, (BL) ©Richard Shiell/Animals Animals/Earth Scenes, (BR) ©Kevin Schafer/Corbis; 125 (BL) ©DK Images, (CL) ©Stephen Dalton/NHPA Limited, (BL) ©George Bernard/NHPA Limited, (CC) Getty Images; fl_ch04_youarethere.flp: ©Tom Brakefield/Corbis; fl_ch05_youarethere.flp: ©DK Images; fl_ch06_howtoread.flp: ©Alan. R. Moller/Getty Images; fl_ch06_youarethere.flp: ©Otto Rogge/Corbis, (Bkgd) ©Bill Ross/Corbis; fl_ch07_howtoread.flp: Colin Keates/©DK Images; fl_ch07_mathinscience.flp: 220 (Bkgd) ©Pat O'Hara/Corbis, (TL, BR) ©James L. Amos/Corbis, (CL) ©George H. H. Huey/ Corbis, (BL) Colin Keates/Natural History Museum/©DK Images; 221 ©Lowell Georgia/Corbis; 222 (T, CR) ©DK Images, (CL) ©Richard T. Nowitz/Corbis, (BR) ©Layne Kennedy/Corbis; fl_ch07_youarethere.flp: ©Richard T. Nowitz/Corbis; fl_ch08_howtoread.flp: Getty Images; fl_ch09_howtoread.flp: ©Jim Cummins/Corbis; fl_ch09_mathinscience.flp: ©Bryn Colton/Assignments Photographers/Corbis; fl_ch09_youarethere.flp: ©Jim Cummins/Corbis; fl_ch10_howtoread.flp: Getty Images; fl_ch10_youarethere.flp: (C) Getty Images, (Bkgd) ©Paul Barton/Corbis; fl_ch11_howtoread.flp: (Bkgd) ©Thinkstock, (C) ©Tom & Dee Ann McCarthy/ Corbis; fl_ch11_mathinscience.flp: ©Tom Tracy/Corbis; fl_ch11_youarethere.flp: ©Thinkstock; fl_ch12_howtoread.flp: (Bkgd) ©Roger Tidman/Corbis, (TR) Getty Images; fl_ch12_mathinscience.flp: ©Scott Tysick/ Masterfile Corporation; fl_ch12_youarethere.flp: ©Roger Tidman/Corbis; fl_ch13_howtoread.flp: (TR) ©Stone/Getty Images, (CL) ©DK Images, (Bkgd) ©Retuters/Corbis; fl_ch13_mathinscience.flp: 412 ©Michael Newman/PhotoEdit; 413 (TC) ©Royalty-Free/Corbis, (CR) ©LWA-Dann Tardif/Corbis, (BL) ©Ariel Skelley/Corbis, (TL) ©Hutchings Stock Photography/Corbis; fl_ch13_youarethere.flp: ©Reuters/Corbis; fl_ua_wrapup.flp: (BL) ©Tom Brakefield/Corbis, (TCL) ©Alan G. Nelson/Animals Animals/Earth Scenes, (TL) Corbis, (CL) ©Clem Haagner/Gallo Images/Corbis; fl_ub_wrapup.flp: ©DK Images, ©Otto Rogge/Corbis, ©DK Images; fl_uc_testtalk.flp: PhotoLibrary; fl_uc_wrapup.flp: (BCL) ©Paul Barton/Corbis, (BL) ©Thinkstock, (CL) ©Jim Cummins/Corbis, (CL) Getty Images; fl_ud_testtalk.flp: ©Arthur Tilley/Getty Images; fl_ud_wrapup.flp: ©Roger Tidman/Corbis.

Grade 3

Active Glossary Credits
asteroid : ©JPL/TSADO/Tom Stack & Associates, Inc.; blizzard : ©Boden/Ledingham/Masterfile Corporation; carnivore : ©Randy Wells/Corbis; chemical change : ©DK Images; community : Peter Johnson/Corbis; compare : ©DK Images; competition : ©Michael Sewell/Peter Arnold, Inc., ©Daniel Cox/Getty Images, ©John Shaw/Tom Stack & Associates, Inc.; computer : Getty Images; coniferous tree : ©Carolina Biological/Visuals Unlimited; constellation : ©Roger Ressmeyer/Corbis; consumer : Peter Johnson/Corbis; contrast: ©DK Images; core : Big Sesh Studios; crust : Big Sesh Studios; decay : ©Vaughn Fleming/SPL/Photo Researchers, Inc.; deciduous : ©Steve Terrill/Corbis; decomposer : ©Jim Brandenburg/Minden Pictures; desert : ©Yva Mornatiuk/John Eastcott/Minden Pictures; earthquake : Alan Male; ecosystem : ©Andrew Brown;Ecoscene/Corbis; element : ©Larry Stepanowicz/Visuals Unlimited; environment : Melissa Farlow/Aurora & Quanta Productions, ©DK Images, ©Kurt Stier/Corbis; food chain : Neil Fletcher and Matthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/Getty Images; food web :©DK Images, ©Michael Sewell/Peter Arnold, Inc., Neil Fletcher andMatthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/GettyImages, ©Tom Shaw/Tom Stack & Associates, Inc., Getty Images,Michael Quinton/Minden Pictures; fossil : Alan Male; germinate : ©Nigel Cattlin/Photo Researchers, Inc.; germs : ©Dr. Gopal Murti/Photo Researchers, Inc.; grassland : ©Enzo & Paolo Ragazzini/Corbis; groundwater : Studio Liddell; habitat : Clem Haagner; Gallo Images/Corbis; hibernate : ©Marty Stoufer/Animals Animals/Earth Scenes; igneous rock : Alan Male; inherited : ©Manoj Shah/Animals Animals /Earth Scenes; invention : ©Bettmann/Corbis, The Granger Collection, NY; landform : ©Art Wolfe/Getty Images; larva : ©Michael and Patricia Fogden/Corbis; lava : Photographer's Choice/Getty Images; life cycle : ©DK Images; light: ©Maxine Hall/Corbis, ©Adina Tovy/Robert Harding Picture Library Ltd.; magma : ©Robert Madden/NGS Image Collection; making operational definitions : ©DK Images; mantle : Big Sesh Studios; matter : Big Sesh Studios, ©DK Images; metamorphic rock : ©DK Images, Mike Dunning/©DK Images; migrate : ©Joseph H. Bailey/NGS Image Collection; mineral : ©DK Images, Natural History Museum/©DK Images, Colin Keates/Courtesy of Natural History Museum/©DK Images; Moon phase : Paul Oglesby; natural resource : ©D. Boone/Corbis, ©Jim Brandenburg/Minden Pictures, ©Joseph Sohm/ChromoSohm, Inc./Corbis; nonrenewable resources : ©Charles E. Rotkin/Corbis; nutrient: ©G.I. Bernard/Animals Animals/Earth Scenes ; observing : ©Darrell Guilin/Corbis; omnivore : ©Danny Lehman/Corbis; pollinate : Corbis; pollution : Getty Images; population : ©Neil McIntyre/Getty Images; position : ©David Young-Wolff/PhotoEdit; precipitation : ©Stone/Getty Images; predator : ©William Bernard/Corbis, ©Gail Shumway/Getty Images; predicting : ©Roy Rainford/Robert Harding Picture Library, Ltd.; pressure : Big Sesh Studios; prey : Jane Burton/©DK Images, ©Daniel Cox/Getty Images; producer : ©Randy Morse/Animals Animals/Earth Scenes; pupa : ©George D. Lepp/Corbis; recycle : ©Royalty-Free/Corbis, ©Pete Soloutus/Corbis, ©Eric Fowke/PhotoEdit; renewable resource : ©Arthur Rothstein/Corbis; resource : ©Charles O'Rear/Corbis; rock: ©J. Eastcott Film/NGS Image Collection; rocks : ©J. Eastcott Film/NGS Image Collection; sedimentary rock : ©DK Images, Colin Keates/Courtesy of the Natural History Museum/©DK Images; seed leaf : Alan Barnard; seedling : Derek Hall/©DK Images; sequence : ©Charles Melton/Visuals Unlimited, ©Brad Morgan/Visuals Unlimited, ©Dick Scott/Visuals Unlimited, ©DK Images; soil : Clive Streeter/©DK Images, ©DK Images; solar system : ©NASA/Photo Researchers, Inc.; star : ©Roger Ressmeyer/Corbis; Sun : NASA; system : Leonello Calvetti, ©Lester Lefkowitz/Corbis; technology :Peter Anderson/©DK Images, ©Science Museum/Science & SocietyPicture Library, Getty Images, Stepen Oliver/©DK Images, ©AppleComputers, Inc.; telescope : ©DK Images; tool : Getty Images; trait : ©American Images Inc./Getty Images; tundra : ©Andy Binns/Ecoscene; vertebrate : ©DK Images, Jerry Young/©DK Images; water cycle : Peter Bollinger; weather : ©Nigel J. Dennis/Gallo Images/Corbis, ©Marc Muench/Corbis, ©Taxi/Getty Images, ©Bruce Peebles/Corbis; weathering : Natural History Museum/©DK Images, ©Jeremy Horner/Corbis; wetland : ©Jim Zipp/Photo Researchers, Inc.

Active Glossary Credits - California
asteroid : ©JPL/TSADO/Tom Stack & Associates, Inc.; biome : Adam Benton; camouflage :Stephen Krasemann/Stone, T. Kitchin and V. Hurst/NHPA Limited, ©RichardK. LaVal/Animals Animals/Earth Scenes, Corbis, ©D. Robert & LorriFranz/Corbis, Jean-Louis LeMoigne/NHPA Limited; chaparral : ©Ken Lucas/Visuals Unlimited; chemical change : ©DK Images; color : ©David Parker/Photo Researchers, Inc.; competition : ©Michael Sewell/Peter Arnold, Inc., ©Daniel Cox/Getty Images, ©John Shaw/Tom Stack & Associates, Inc.; coniferous forest : ©Pat O'Hara/Corbis; constellation : ©Roger Ressmeyer/Corbis; crater : NASA Image Exchange; crescent moon : ©John Sanford/Photo Researchers, Inc.; cycle : Peter Bollinger; deciduous forest : ©Steve Terrill/Corbis; desert : ©Yva Mornatiuk/John Eastcott/Minden Pictures; digestive system : Jeff Mangiat; dry ice : ©Charles D. Winters/Photo Researchers, Inc.; element : ©Larry Stepanowicz/Visuals Unlimited; environment : Melissa Farlow/Aurora & Quanta Productions, ©DK Images, ©Kurt Stier/Corbis; eye : Robert Kayganich; first quarter moon : ©John Sanford/Photo Researchers, Inc.; forest : ©W. Perry Conway/Corbis, ©Taxi/Getty Images; fossil : Alan Male; fuel : ©Holly Harris/Getty Images; full moon : ©John Sanford/Photo Researchers, Inc.; fungi : ©Jim Brandenburg/Minden Pictures; fur : ©DK Images, Stephen Krasemann/Stone; galaxy : KSC/NASA; gills : ©Taxi/Getty Images; grassland : ©Enzo & Paolo Ragazzini/Corbis; habitat : Clem Haagner; Gallo Images/Corbis; lava : Photographer's Choice/Getty Images; lichen : Daniel J. Cox/Natural Exposures.com; light: ©Maxine Hall/Corbis, ©Adina Tovy/Robert Harding Picture Library Ltd.; lightning : Greg Harris; machine : Getty Images; matter : Big Sesh Studios, ©DK Images; new Moon : ©John Sanford/Photo Researchers, Inc.; nuclear energy : Getty Images; nutrients : ©G.I. Bernard/Animals Animals/Earth Scenes ; observe: ©Darrell Guilin/Corbis; ocean : Digital Vision; opaque : ©Andy Binns/Ecoscene; phases of the Moon : ©John Sanford/Photo Researchers, Inc.; predict : ©Roy Rainford/Robert Harding Picture Library, Ltd.; reproduction : ©Eric & David Hosking/Corbis, ©Tom Brakefield/Corbis; resource : ©Charles O'Rear/Corbis; sequence : ©Charles Melton/Visuals Unlimited, ©Brad Morgan/Visuals Unlimited, ©Dick Scott/Visuals Unlimited, ©DK Images; shelter : ©Royalty-Free/Corbis; solar system : ©NASA/Photo Researchers, Inc.; space probe : JPL/NASA; star : ©Roger Ressmeyer/Corbis; substance : ©Anna Zuckerman-Vdovenko/PhotoEdit, Getty Images; Sun : NASA; surface : Getty Images; survival : ©Bill Curtsinger/NGS Image Collection, ©T. Kitchin & V. Hurst/NHPA Limited; symbol: Dave King/Pitt Rivers Museum/University of Oxford, Oxford/©DK Images; telescope : ©DK Images; third quarter Moon : ©John Sanford/Photo Researchers, Inc.; tundra : ©Andy Binns/Ecoscene; waning Moon : ©John Sanford/Photo Researchers, Inc.; waxing Moon : ©John Sanford/Photo Researchers, Inc.; wetland : ©Jim Zipp/Photo Researchers, Inc.

Active Art
Solar System: ©GettyImages, Mariner 10/NASA, Pioneer Venus Orbiter/NASA, VoyagerI/NASA/NSSDC, NASA and the Hubble Heritage Team (STScl/AURA)/HubbleSpace Telescope WFPC2/STScl-PRC01-15, NASA/NSSDC (Image Processing byJody Swann/Tammy Becker/Alfred McEwen using the PICS [Planetary ImageCartography System] image processing system developed at the U.S.Geological Survey in Flagstaff, Arizona), Apollo 17 Crew/NASA, E.Karkoschka et al. (University of Arizona)/NICMOS/HST/NASA, Dr. R.Albrecht (ESA/ESO)/NASA, Voyager II/NASA.
Observing Objects:©Getty Images, Mariner 10/NASA, Pioneer Venus Orbiter/NASA, VoyagerI/NASA/NSSDC, NASA and the Hubble Heritage Team (STScl/AURA)/HubbleSpace Telescope WFPC2/STScl-PRC01-15, NASA/NSSDC (Image Processing byJody Swann/Tammy Becker/Alfred McEwen using the PICS [Planetary ImageCartography System] image processing system developed at the U.S.Geological Survey in Flagstaff, Arizona)

Games
Nanoboy: Courtesy IBM Corporation. Carbon illustrations, Tony Randazzo. Name That Mineral!: DK Images, Colin Keates/Courtesy of the Natural History Museum, London/DK Images. Build a Food Web:DK Images, Stephen Krasemann/NHPA Limited, Jim Zipp/Photo Researchers,Inc., Joe McDonald/Corbis, © Royalty-Free/Corbis, ©Gail Shumway/GettyImages. Ecosystems: ©J. Eastcott/Y. Eastcott Film/NGSImage Collection, ©Enzo & Paolo Ragazzini/Corbis, ©AndyBinns/Ecoscene, ©Jim Zipp/Photo Researchers, Inc.

Active Glossary Credits - Spanish
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Science Games
Question 1 ©The Image Bank/Getty Images, ©DK Images,Geoff Moon/Frank Lane Picture Agency/Corbis, ©Ric Ergenbright/Corbis,Getty Images, ©Michael & Patricia Fogden/Corbis, ©John Lund/Corbis,©G. Renner/Robert Harding Picture Library Ltd., ©Robb DeWall, ©SteveMaslowski/Photo Researchers, Inc., Jerry Young/©DK Images, GettyImages, Brand X Pictures, ©Tony Freeman/PhotoEdit, ©David Parker/PhotoResearchers, Inc., ©Kaz Mori/Getty Images, ©Dan Chung/Reuters/Landov,LLC, ©Ron Thomas/Getty Images, ©Gerald L. Kooyman/Animals Animals/EarthScenes, The Granger Collection, NY, (TR) ©Bruce Burkhardt/Corbis Question 2 ©Taxi/Getty Images, ©Royalty-Free/Corbis, Getty Images, ©William J.Weber/Visuals Unlimited, ©Ted Levin/Animals Animals/Earth Scenes,©Garry Black/Masterfile Corporation, Daniel J. Cox/NaturalExposures.com, ©David Ulmer/Stock Boston, ©Claus Meyer/Minden Pictures,©Yva Momatiuk/John Eastcott/Minden Pictures, ©Paul Almasy/Corbis, ©AlanSchein Photography/Corbis, ©Royalty-Free/Corbis, ©David Paynter/AgeFotostock Question 3 ©J. & B.Photographers/Animals Animals/Earth Scenes, S. PurdyMatthews/Stone/Getty Images, Alan G. Nelson/Animals Animals/EarthScenes, ©Taxi/Getty Images, ©Brand X Pictures/Getty Images, ©The ImageBank/Getty Images, Flip Nicklin/Minden Pictures, ©Carol Havens/Corbis,©Leonard Lessin/Peter Arnold, Inc., ©DK Images, Stephen Frink/Corbis,©Paulo De Oliviera/Animals Animals/Earth Scenes, ©DK Images,©Fotopic/Index Stock Imagery, ©Jose Fuste Raga/eStock Photo,©Duomo/Corbis, Getty Images, Bob Langrish/©DK Images, ©KevinAitken/Peter Arnold, Inc., ©Chris Newbert/Minden Pictures Question 4 ©Tom Brakefield/Corbis, ©Mark L. Stephenson/Corbis, Courtesy of theLondon Toy and Model Museum, Paddington, London/©DK Images, DK Images,Pete Atkinson/NHPA Limited, ©James Watt/Animals Animals/Earth Scenes,Kent Wood/Photo Researchers, Inc., ©Joe McDonald/Corbis, ©RodPlanck/Photo Researchers, Inc., ©Royalty-Free/Corbis, ©RogerRessmeyer/Corbis, ©/Corbis, ©Tom Bean/Corbis, ©YannArthus-Bertrand/Corbis, Getty Images, ©Roger Leo/Index Stock Imagery,Jerry Young/©DK Images, Daniel J. Cox/Daniel J. Cox/Natural Exposures,©Frans Lanting/Minden Pictures, ©Manfred Danegger/Photo Researchers,Inc., ©Zigmund Leszczynski/Animals Animals/Earth Scenes, ©Michael andPatricia Fogden/Corbis, Alan G. Nelson/Animals Animals/Earth Scenes,©Sumio Harada/Minden Pictures, ©John Stern/Animals Animals/Earth ScenesQuestion 5 ©The Image Bank/Getty Images, ©HollyHarris/Getty Images, ©Taxi/Getty Images, ©Richard Megna/FundamentalPhotographs, Dave King/Pitt Rivers Museum/University of Oxford,Oxford/©DK Images, ©DK Images, ©Gary W. Carter/Corbis, ©RolfKopfle/Bruce Coleman Inc., ©DK Images, ©Tom Uhlman/Visuals Unlimited,©DK Images, ©Arnulf Husmo/Getty Images5 ©Joseph Sohm/ChromoSohmInc./Corbis, ©GSFC/NASA Image Exchange, ©JPL/NASA, ©ArielSkelley/Corbis Question 6 ©Julie Eggers/BruceColeman Inc., ©Steve Solum/Bruce Coleman Inc., ©Comstock Inc.,©Stone/Getty Images, ©Doug Scott/Age Fotostock, ©DK Images, ©Andrew J.Martinez/Photo Researchers, Inc., ©Ralph White/Corbis, ©DK Images, AndyCrawford/©DK Images, Getty Images, ©John Sanford/Photo Researchers,Inc., Adam Benton, ©NOAO/Gatley Merrill/Ressmeyer/Corbis Question 7 Corbis, ©Comstock Inc., Getty Images, ©/Corbis, ©MacduffEverton/Corbis, ©E. Braverman/Getty Images, ©Raymond Gehman/NGS ImageCollection, ©Cornelia Doerr/Age Fotostock, G. Li Causi/A.Ricciardi/A.Garatti/Alessandro Vannini, Rome , Italy Question 8 ©Boden/Ledingham/Masterfile Corporation, ©Lester Lefkowitz/Corbis, ©Andrew Brown; Ecoscene/Corbis, ©Tom Bean/DRK Photo Question 9 ©Tom Uhlman/Visuals Unlimited, Digital Vision, ©Indianapolis Star,Frank Espich/AP/Wide World Photos, ©Hulton-Deutsch Collection/Corbis,DK Images, ©Joseph Van Os/Getty Images, ©Roger Ressmeyer/Corbis Question 10 ©Terry Renna/AP/Wide World Photos, ©David Vaughan/Photo Researchers,Inc., Photo Library, ©DK Images, Royal Museum of Scotland /©DK Images,©Roger Wilmshurst; Frank Lane Picture Agency/Corbis, (C) Getty Images,©Doug Sokell/Visuals Unlimited, ©NOAO/Gatley Merrill/Ressmeyer/Corbis

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Grade 4

Active Glossary Credits
astronomy : ©Roger Ressmeyer/Corbis; carnivores : ©Randy Wells/Corbis; cell : Robert Ulrich; chemical change : ©DK Images; chlorophyll : Robert Ulrich; chloroplast : Robert Ulrich; communication : Getty Images; community : Peter Johnson/Corbis; compare : ©DK Images; competition : ©Michael Sewell/Peter Arnold, Inc., ©Daniel Cox/Getty Images, ©John Shaw/Tom Stack & Associates, Inc.; constellation : ©Roger Ressmeyer/Corbis; consumer : Peter Johnson/Corbis; contrast: ©DK Images; convection current : Studio Liddell; crater : NASA Image Exchange; cytoplasm : Tony Randazzo; decomposers : ©Jim Brandenburg/Minden Pictures; earthquake : Alan Male; ecosystem : ©Andrew Brown;Ecoscene/Corbis; electromagnet : Science Museum/©DK Images; element : ©Larry Stepanowicz/Visuals Unlimited; energy transfer : Neil Fletcher and Matthew Ward/DK Images, ©Michael Sewell/Peter Arnold, Inc., ©John Shaw/Tom Stack & Associates, Inc.; environment : Melissa Farlow/Aurora & Quanta Productions, ©DK Images, ©Kurt Stier/Corbis; epicenter : Alan Male; fault : Alan Male; fertilization : David Preiss; food chain : Neil Fletcher and Matthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/Getty Images; food web :©DK Images, ©Michael Sewell/Peter Arnold, Inc., Neil Fletcher andMatthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/GettyImages, ©Tom Shaw/Tom Stack & Associates, Inc., Getty Images,Michael Quinton/Minden Pictures; fossil : Alan Male; fossil fuels : Tony Randazzo; front : ©DK Images; galaxy : KSC/NASA; genus : ©Darren Bennett/Animals Animals/Earth Scenes, Jerry Young/©DK Images; habitat : Clem Haagner; Gallo Images/Corbis; hazardous waste : Getty Images; host : ©Frank Blackburn; Ecoscene/Corbis; humidity : ©DK Images; humus : Clive Streeter/©DK Images; igneous rock : Alan Male; immune system : ©Dr. Richard Kessel & Dr. Randy Kardon/Tissues & Organs/Visuals Unlimited; invertebrates :©Jerry Young/DK Images, ©Peter Steiner/Corbis, ©Philip JamesCorwin/Corbis, ©Andrew Syred/Photo Researchers, Inc., ©DK Images, ©F.J.Jackson/Robert Harding Picture Library Ltd., Dave King/DK Images; involuntary muscles : Leonello Calvetti; landform : ©Art Wolfe/Getty Images; landslide : ©Paul Souders/Corbis; life cycle : ©DK Images; light: ©Maxine Hall/Corbis, ©Adina Tovy/Robert Harding Picture Library Ltd.; luster : ©DK Images; making operational definitions : ©DK Images; matter : Big Sesh Studios, ©DK Images; metamorphic rock : ©DK Images, Mike Dunning/©DK Images; mineral : ©DK Images, Natural History Museum/©DK Images, Colin Keates/Courtesy of Natural History Museum/©DK Images; moon : JPL/NASA; Moon phase : Paul Oglesby; neuron : ©CNRI/Photo Researchers, Inc.; niche : ©Raymond Gehman/Corbis; nonrenewable resources : ©Charles E. Rotkin/Corbis; nucleus : Robert Ulrich; observing : ©Darrell Guilin/Corbis; omnivores : ©Danny Lehman/Corbis; opaque : ©Andy Binns/Ecoscene; optical fibers : ©Matthew Borkoski/Index Stock; ore : ©DK Images; organ : Big Sesh Studios; organism : ©Ken Cole/Animals Animals/Earth Scenes, Getty Images; ovary : ©Royalty-Free/Corbis; parasite : ©Frank Blackburn; Ecoscene/Corbis; pathogens : Jeff Mangiat; petroleum : ©Tom & Pat Leeson/Photo Researchers, Inc.; photosynthesis : Jeff Mangiat; pistil : ©Royalty-Free/Corbis; pollution : Getty Images; population : ©Neil McIntyre/Getty Images; precipitation : ©Stone/Getty Images; predator : ©William Bernard/Corbis, ©Gail Shumway/Getty Images; predict : ©Roy Rainford/Robert Harding Picture Library, Ltd.; predicting : ©Roy Rainford/Robert Harding Picture Library, Ltd.; prey : Jane Burton/©DK Images, ©Daniel Cox/Getty Images; producer : ©Randy Morse/Animals Animals/Earth Scenes; protist : ©Eric Grave/Phototake; radiation : Robert Kayganich; recycling : ©Royalty-Free/Corbis, ©Pete Soloutus/Corbis, ©Eric Fowke/PhotoEdit; renewable resource : ©Arthur Rothstein/Corbis; resource : ©Charles O'Rear/Corbis; satellite: ©David Ducros/Photo Researchers, Inc.; screw : ©DK Images; sediment : Alan Male; sedimentary rock : ©DK Images, Colin Keates/Courtesy of the Natural History Museum/©DK Images; sepal : ©Royalty-Free/Corbis; sequence : ©Charles Melton/Visuals Unlimited, ©Brad Morgan/Visuals Unlimited, ©Dick Scott/Visuals Unlimited, ©DK Images; solar cells : AP Images; solar energy : ©Kevin Burke/Getty Images; solar system : ©NASA/Photo Researchers, Inc.; space probe : JPL/NASA; species : Jerry Young/©DK Images; stamen : ©Royalty-Free/Corbis; star : ©Roger Ressmeyer/Corbis; storm surge : ©DK Images; succession : Peter Bollinger; Sun : NASA; system : Leonello Calvetti, ©Lester Lefkowitz/Corbis; technology :Peter Anderson/©DK Images, ©Science Museum/Science & SocietyPicture Library, Getty Images, Stepen Oliver/©DK Images, ©AppleComputers, Inc.; telecommunications : Jupiter Images, ©Apple Computers, Inc.; tissue : Leonello Calvetti; translucent : ©Andy Binns/Ecoscene; transparent : ©Andy Binns/Ecoscene; universe : ©Royalty-Free/Corbis; vaccine : ©Steve Raymer/Corbis; vehicle : ©D. Rose/Zefa/Masterfile Corporation; vertebrates : ©DK Images, Jerry Young/©DK Images; voluntary muscles : Big Sesh Studios; water cycle : Peter Bollinger; weathering : Natural History Museum/©DK Images, ©Jeremy Horner/Corbis.

Active Glossary Credits - California
acid rain: ©Will & Deni McIntyre/Corbis; algae : ©Roland Birke/Peter Arnold, Inc.; antibiotic : American Museum of Natural History/DK Images, ©Royalty-Free/Corbis; arch: ©Gabe Palmer/Corbis; bacteria : ©SciMAT/Photo Researchers Inc., ©S. Lowry/Univ. Ulster/Getty Images, ©Institut Pasteur/Phototake; baleen : ©Tim Davis/Corbis; biomass : ©Steve Terrill/Corbis; boulder : ©Jeremy Homer/Corbis; calcite : ©DK Images; canopy : Hauser/laif/©Aurora Photos; canyon : ©Macduff Everton/Corbis; carbon dioxide : ©Charles D. Winters/Photo Researchers, Inc.; carnivore : ©Randy Wells/Corbis; chemical weathering : ©Angelo Homak/Corbis, ©Historical Picture Archive/Corbis; climate : Daniel J. Cox/Natural Exposures; coast : ©David Lawrence/Corbis; community : Peter Johnson/Corbis; compare and contrast : ©DK Images; competition : ©Michael Sewell/Peter Arnold, Inc., ©Daniel Cox/Getty Images, ©John Shaw/Tom Stack & Associates, Inc.; consumer : Peter Johnson/Corbis; copper : ©Paul Silverman/Fundamental Photographs; coral reef : ©Ralph White/Corbis; crust : Big Sesh Studios; crystal : ©DK Images; decomposer : ©Jim Brandenburg/Minden Pictures; desert : ©Yva Mornatiuk/John Eastcott/Minden Pictures; diatom : ©Steve Gschmeissner/Photo Researchers, Inc.; earthquake : Alan Male; ecosystem : ©Andrew Brown;Ecoscene/Corbis; electric motor : Tony Randazzo; electrical energy : Greg Harris; electromagnet : Science Museum/©DK Images; environment : Melissa Farlow/Aurora & Quanta Productions, ©DK Images, ©Kurt Stier/Corbis; euglena: ©Biophoto Associates/Photo Researchers, Inc.; fault : Alan Male; feldspar : ©DK Images; fertilization : David Preiss; flood : ©Jacques Langevin/Sygma/Corbis; food chain : Neil Fletcher and Matthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/Getty Images; food web :©DK Images, ©Michael Sewell/Peter Arnold, Inc., Neil Fletcher andMatthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/GettyImages, ©Tom Shaw/Tom Stack & Associates, Inc., Getty Images,Michael Quinton/Minden Pictures; freshwater : ©Michael P. Gadornski/Photo Researchers, Inc.; fruit : ©DK Images; fungus : ©Jim Brandenburg/Minden Pictures; galena : ©Colin Keats/Courtesy of the Natural History Museum; generator : Tony Randazzo; glacier : ©K. Gilham/Robert Harding Picture Library Ltd.; grassland : ©Enzo & Paolo Ragazzini/Corbis; habitat : Clem Haagner; Gallo Images/Corbis; hardness :©Charles D. Winters/Photo Researchers, Inc., DK Images, Richard M.Busch, Natural History Museum/DK Images, Colin Keates, The NaturalHistory Museum, London/DK, ©E.R. Degginger/Color-Pic, Inc.; hematite : ©DK Images; hornblende : Natural History Museum/DK Images; host : ©Frank Blackburn; Ecoscene/Corbis; humus : Clive Streeter/©DK Images; igneous : Alan Male; insect : ©DK Images; iron : ©DK Images; landform : ©Art Wolfe/Getty Images; landslide : ©Paul Souders/Corbis; lava : Photographer's Choice/Getty Images; lead : ©DK Images; light: ©Maxine Hall/Corbis, ©Adina Tovy/Robert Harding Picture Library Ltd.; luster : ©DK Images; magma : ©Robert Madden/NGS Image Collection; mammal : ©Joe McDonald/Corbis; mantle : Big Sesh Studios; marsh : ©David Muench/Corbis; matter : Big Sesh Studios, ©DK Images; metamorphic : ©DK Images, Mike Dunning/©DK Images; mica : ©DK Images; microorganism: ©SciMAT/Photo Researchers Inc., ©S. Lowry/Univ. Ulster/Getty Images, ©Institut Pasteur/Phototake; migrate : ©Joseph H. Bailey/NGS Image Collection; mineral : ©DK Images, Natural History Museum/©DK Images, Colin Keates/Courtesy of Natural History Museum/©DK Images; Mohs scale :©Charles D. Winters/Photo Researchers, Inc., ©DK Images, NaturalHistory Museum/©DK Images, Colin Keates/The Natural History Museum,London/©DK Images; mold : Getty Images; nectar : Corbis; nematode : ©Sinclair Stammers/Photo Researchers, Inc.; nutrient: ©G.I. Bernard/Animals Animals/Earth Scenes ; observe: ©Darrell Guilin/Corbis; omnivore : ©Danny Lehman/Corbis; ore : ©DK Images; organism : ©Ken Cole/Animals Animals/Earth Scenes, Getty Images; oxygen : ; parasite : ©Frank Blackburn; Ecoscene/Corbis; pebble : Natural History Museum/©DK Images, ©Jeremy Horner/Corbis; peninsula : Big Sesh Studios; photosynthesis : Jeff Mangiat; physical weathering : Natural History Museum/©DK Images, ©Jeremy Horner/Corbis; pistil : ©Royalty-Free/Corbis; plains : ©Enzo & Paolo Ragazzini/Corbis; plankton : ©Alfred Pasieka/Photo Researchers, Inc.; pollution : Getty Images; population : ©Neil McIntyre/Getty Images; predator : ©William Bernard/Corbis, ©Gail Shumway/Getty Images; predict : ©Roy Rainford/Robert Harding Picture Library, Ltd.; pressure : Big Sesh Studios; prey : Jane Burton/©DK Images, ©Daniel Cox/Getty Images; primary consumer : ©Royalty-Free/Corbis, ©Joe McDonald/Corbis; process : ©Chase Swift/Corbis, Getty Images, ©Naturfoto Honal/Corbis, ©Tom Brakefield/Corbis; producer : ©Randy Morse/Animals Animals/Earth Scenes; protist : ©Eric Grave/Phototake; quartz : ©DK Images; radiolarian : ©Alfred Pasieka/Photo Researchers, Inc.; rain forest : ©Gary Braasch/Corbis; recycle : ©Royalty-Free/Corbis, ©Pete Soloutus/Corbis, ©Eric Fowke/PhotoEdit; remains : ©Breck P. Kent/Animals Animals/Earth Scenes, Andy Crawford/Courtesy of the Senckenberg Nature Museum, Frankfurt/©DK Images; resource : ©Charles O'Rear/Corbis; river: ©Altitude/Peter Arnold, Inc.; rock cycle : Alan Male; rotor : Tony Randazzo; salt marsh : ©Myrleen Ferguson Cate/PhotoEdit; sand dune: ©Frans Lemmens/Getty Images; scavenger : ©DK Images; secondary consumer : ©Royalty-Free/Corbis, ©Joe McDonald/Corbis, ©Gail Shumway/Getty Images; sediment : Alan Male; sedimentary : ©DK Images, Colin Keates/Courtesy of the Natural History Museum/©DK Images; seedling : Derek Hall/©DK Images; sequence : ©Charles Melton/Visuals Unlimited, ©Brad Morgan/Visuals Unlimited, ©Dick Scott/Visuals Unlimited, ©DK Images; shrub : ©Hans Strand/Corbis; soil : Clive Streeter/©DK Images, ©DK Images; stamen : ©Royalty-Free/Corbis; streak : Colin Keates/Courtesy of the Natural History Museum/©DK Images, ©DK Images; survive : ©Bill Curtsinger/NGS Image Collection, ©T. Kitchin & V. Hurst/NHPA Limited; swamp : ©Ed Reschke/Peter Arnold, Inc.; symbiosis: ©Stephen Frink/Corbis; temperate: ©Tim Fitzharris/Minden Pictures; territory : ©Nigel Bean/Nature Picture Library; trait : ©American Images Inc./Getty Images; tundra : ©Andy Binns/Ecoscene; understory : Hauser/laif/Aurora Photos; valley : ©Dr. Marli Miller/Visuals Unlimited; vent : ©Soames Summerhays/Photo Researchers, Inc.; weathering : Natural History Museum/©DK Images, ©Jeremy Horner/Corbis; wetland : ©Jim Zipp/Photo Researchers, Inc.

Active Art
Solar System: ©Getty Images, Mariner 10/NASA, PioneerVenus Orbiter/NASA, Voyager I/NASA/NSSDC, NASA and the Hubble HeritageTeam (STScl/AURA)/Hubble Space Telescope WFPC2/STScl-PRC01-15,NASA/NSSDC (Image Processing by Jody Swann/Tammy Becker/Alfred McEwenusing the PICS [Planetary Image Cartography System] image processingsystem developed at the U.S. Geological Survey in Flagstaff, Arizona),Apollo 17 Crew/NASA, E. Karkoschka et al. (University ofArizona)/NICMOS/HST/NASA, Dr. R. Albrecht (ESA/ESO)/NASA, VoyagerII/NASA.
Observing Objects: ©Getty Images,Mariner 10/NASA, Pioneer Venus Orbiter/NASA, Voyager I/NASA/NSSDC, NASAand the Hubble Heritage Team (STScl/AURA)/Hubble Space TelescopeWFPC2/STScl-PRC01-15, NASA/NSSDC (Image Processing by Jody Swann/TammyBecker/Alfred McEwen using the PICS [Planetary Image CartographySystem] image processing system developed at the U.S. Geological Surveyin Flagstaff, Arizona)

Games
Nanoboy: Courtesy IBM Corporation. Carbon illustrations, Tony Randazzo. Name That Mineral!: DK Images, Colin Keates/Courtesy of the Natural History Museum, London/DK Images. Build a Food Web:DK Images, Stephen Krasemann/NHPA Limited, Jim Zipp/Photo Researchers,Inc., Joe McDonald/Corbis, © Royalty-Free/Corbis, ©Gail Shumway/GettyImages. Ecosystems: ©J. Eastcott/Y. Eastcott Film/NGSImage Collection, ©Enzo & Paolo Ragazzini/Corbis, ©AndyBinns/Ecoscene, ©Jim Zipp/Photo Researchers, Inc.

Active Glossary Credits - Spanish
accidente geográfico : ©Art Wolfe/Getty Images; ambiente : Melissa Farlow/Aurora & Quanta Productions, ©DK Images, ©Kurt Stier/Corbis; astronomía : ©Roger Ressmeyer/Corbis; cadena alimentaria : Neil Fletcher and Matthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/Getty Images; cambio químico : ©DK Images; carnívoro : ©Randy Wells/Corbis; celdas solares : AP Images; célula : Robert Ulrich; ciclo de vida: ©DK Images; ciclo del agua : Peter Bollinger; citoplasma : Tony Randazzo; clorofila : Robert Ulrich; cloroplasto : Robert Ulrich; combustible fósil : Tony Randazzo; comparar : ©DK Images; competencia : ©Michael Sewell/Peter Arnold, Inc., ©Daniel Cox/Getty Images, ©John Shaw/Tom Stack & Associates, Inc.; comunicacción : Getty Images; comunidad : Peter Johnson/Corbis; constelación : ©Roger Ressmeyer/Corbis; consumidor : Peter Johnson/Corbis; contaminación : Getty Images; contrastar : ©DK Images; corriente de convección : Studio Liddell; cráteres : NASA Image Exchange; descomponedor : ©Jim Brandenburg/Minden Pictures; desechos peligrosos : Getty Images; deslizamiento de tierra : ©Paul Souders/Corbis; ecosistema : ©Andrew Brown;Ecoscene/Corbis; electroimán : Science Museum/©DK Images; elemento : ©Larry Stepanowicz/Visuals Unlimited; energía solar : ©Kevin Burke/Getty Images; epicentro : Alan Male; especie : Jerry Young/©DK Images; estambre : ©Royalty-Free/Corbis; estrella : ©Roger Ressmeyer/Corbis; falla : Alan Male; fases de la Luna : Paul Oglesby; fertilización : David Preiss; fibra óptica : ©Matthew Borkoski/Index Stock; fósil : Alan Male; fotosíntesis : Jeff Mangiat; frente : ©DK Images; galaxia : KSC/NASA; género : ©Darren Bennett/Animals Animals/Earth Scenes, Jerry Young/©DK Images; hábitat : Clem Haagner; Gallo Images/Corbis; huésped : ©Frank Blackburn; Ecoscene/Corbis; humedad : ©Jim Zipp/Photo Researchers, Inc.; humus : Clive Streeter/©DK Images; invertebrados :©Jerry Young/DK Images, ©Peter Steiner/Corbis, ©Philip JamesCorwin/Corbis, ©Andrew Syred/Photo Researchers, Inc., ©DK Images, ©F.J.Jackson/Robert Harding Picture Library Ltd., Dave King/DK Images; lustre : ©DK Images; luz : ©Maxine Hall/Corbis, ©Adina Tovy/Robert Harding Picture Library Ltd.; marea de tempestad : ©DK Images; materia : Big Sesh Studios, ©DK Images; mena : ©DK Images; meteorización : Natural History Museum/©DK Images, ©Jeremy Horner/Corbis; mineral : ©DK Images, Natural History Museum/©DK Images, Colin Keates/Courtesy of Natural History Museum/©DK Images; músculos involuntarios : Leonello Calvetti; músculos voluntarios : Big Sesh Studios; neurona : ©CNRI/Photo Researchers, Inc.; nicho ecológico : ©Raymond Gehman/Corbis; núcleo : Big Sesh Studios; observar : ©Darrell Guilin/Corbis; omnívoro : ©Danny Lehman/Corbis; opaco : ©Andy Binns/Ecoscene; organismo : ©Ken Cole/Animals Animals/Earth Scenes, Getty Images; órgano : Big Sesh Studios; ovario : ©Royalty-Free/Corbis; parásito : ©Frank Blackburn; Ecoscene/Corbis; patógeno : Jeff Mangiat; petróleo crudo : ©Tom & Pat Leeson/Photo Researchers, Inc.; pistilo : ©Royalty-Free/Corbis; plantear definiciones operativas : ©DK Images; población : ©Neil McIntyre/Getty Images; precipitación : ©Stone/Getty Images; predador : ©William Bernard/Corbis, ©Gail Shumway/Getty Images; predecir : ©Roy Rainford/Robert Harding Picture Library, Ltd.; presa : Jane Burton/©DK Images, ©Daniel Cox/Getty Images; productor : ©Randy Morse/Animals Animals/Earth Scenes; protista : ©Eric Grave/Phototake; radiación : Robert Kayganich; reciclaje : ©Royalty-Free/Corbis, ©Pete Soloutus/Corbis, ©Eric Fowke/PhotoEdit; recurso : ©Charles O'Rear/Corbis; recurso no renovable : ©Charles E. Rotkin/Corbis; recurso renovable : ©Arthur Rothstein/Corbis; red alimentaria :©DK Images, ©Michael Sewell/Peter Arnold, Inc., Neil Fletcher andMatthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/GettyImages, ©Tom Shaw/Tom Stack & Associates, Inc., Getty Images,Michael Quinton/Minden Pictures; roca ígnea : Alan Male; roca metamórfica : ©DK Images, Mike Dunning/©DK Images; roca sedimentaria : ©DK Images, Colin Keates/Courtesy of the Natural History Museum/©DK Images; satélite : ©David Ducros/Photo Researchers, Inc.; secuencia : ©Charles Melton/Visuals Unlimited, ©Brad Morgan/Visuals Unlimited, ©Dick Scott/Visuals Unlimited, ©DK Images; sedimento : Alan Male; sépalo : ©Royalty-Free/Corbis; sistema : Leonello Calvetti, ©Lester Lefkowitz/Corbis; sistema inmunitario : ©Dr. Richard Kessel & Dr. Randy Kardon/Tissues & Organs/Visuals Unlimited; sistema solar : ©NASA/Photo Researchers, Inc.; Sol : NASA; sonda espacial : JPL/NASA; sucesión : Peter Bollinger; tecnología :Peter Anderson/©DK Images, ©Science Museum/Science & SocietyPicture Library, Getty Images, Stepen Oliver/©DK Images, ©AppleComputers, Inc.; tejido : Leonello Calvetti; telecomunicaciones : Jupiter Images, ©Apple Computers, Inc.; terremoto : Alan Male; tornillo : ©DK Images; translúcido : ©Andy Binns/Ecoscene; transparente : ©Andy Binns/Ecoscene; universo : ©Royalty-Free/Corbis; vacuna : ©Steve Raymer/Corbis; vehículo : ©D. Rose/Zefa/Masterfile Corporation; vertebrado : ©DK Images, Jerry Young/©DK Images.

Science Games
Question 1 ©The Image Bank/Getty Images, ©DK Images,Geoff Moon/Frank Lane Picture Agency/Corbis, ©Ric Ergenbright/Corbis,Getty Images, ©Michael & Patricia Fogden/Corbis, ©John Lund/Corbis,©G. Renner/Robert Harding Picture Library Ltd., ©Robb DeWall, ©SteveMaslowski/Photo Researchers, Inc., Jerry Young/©DK Images, GettyImages, Brand X Pictures, ©Tony Freeman/PhotoEdit, ©David Parker/PhotoResearchers, Inc., ©Kaz Mori/Getty Images, ©Dan Chung/Reuters/Landov,LLC, ©Ron Thomas/Getty Images, ©Gerald L. Kooyman/Animals Animals/EarthScenes, The Granger Collection, NY, (TR) ©Bruce Burkhardt/Corbis Question 2 ©Taxi/Getty Images, ©Royalty-Free/Corbis, Getty Images, ©William J.Weber/Visuals Unlimited, ©Ted Levin/Animals Animals/Earth Scenes,©Garry Black/Masterfile Corporation, Daniel J. Cox/NaturalExposures.com, ©David Ulmer/Stock Boston, ©Claus Meyer/Minden Pictures,©Yva Momatiuk/John Eastcott/Minden Pictures, ©Paul Almasy/Corbis, ©AlanSchein Photography/Corbis, ©Royalty-Free/Corbis, ©David Paynter/AgeFotostock Question 3 ©J. & B.Photographers/Animals Animals/Earth Scenes, S. PurdyMatthews/Stone/Getty Images, Alan G. Nelson/Animals Animals/EarthScenes, ©Taxi/Getty Images, ©Brand X Pictures/Getty Images, ©The ImageBank/Getty Images, Flip Nicklin/Minden Pictures, ©Carol Havens/Corbis,©Leonard Lessin/Peter Arnold, Inc., ©DK Images, Stephen Frink/Corbis,©Paulo De Oliviera/Animals Animals/Earth Scenes, ©DK Images,©Fotopic/Index Stock Imagery, ©Jose Fuste Raga/eStock Photo,©Duomo/Corbis, Getty Images, Bob Langrish/©DK Images, ©KevinAitken/Peter Arnold, Inc., ©Chris Newbert/Minden Pictures Question 4 ©Tom Brakefield/Corbis, ©Mark L. Stephenson/Corbis, Courtesy of theLondon Toy and Model Museum, Paddington, London/©DK Images, DK Images,Pete Atkinson/NHPA Limited, ©James Watt/Animals Animals/Earth Scenes,Kent Wood/Photo Researchers, Inc., ©Joe McDonald/Corbis, ©RodPlanck/Photo Researchers, Inc., ©Royalty-Free/Corbis, ©RogerRessmeyer/Corbis, ©/Corbis, ©Tom Bean/Corbis, ©YannArthus-Bertrand/Corbis, Getty Images, ©Roger Leo/Index Stock Imagery,Jerry Young/©DK Images, Daniel J. Cox/Daniel J. Cox/Natural Exposures,©Frans Lanting/Minden Pictures, ©Manfred Danegger/Photo Researchers,Inc., ©Zigmund Leszczynski/Animals Animals/Earth Scenes, ©Michael andPatricia Fogden/Corbis, Alan G. Nelson/Animals Animals/Earth Scenes,©Sumio Harada/Minden Pictures, ©John Stern/Animals Animals/Earth ScenesQuestion 5 ©The Image Bank/Getty Images, ©HollyHarris/Getty Images, ©Taxi/Getty Images, ©Richard Megna/FundamentalPhotographs, Dave King/Pitt Rivers Museum/University of Oxford,Oxford/©DK Images, ©DK Images, ©Gary W. Carter/Corbis, ©RolfKopfle/Bruce Coleman Inc., ©DK Images, ©Tom Uhlman/Visuals Unlimited,©DK Images, ©Arnulf Husmo/Getty Images5 ©Joseph Sohm/ChromoSohmInc./Corbis, ©GSFC/NASA Image Exchange, ©JPL/NASA, ©ArielSkelley/Corbis Question 6 ©Julie Eggers/BruceColeman Inc., ©Steve Solum/Bruce Coleman Inc., ©Comstock Inc.,©Stone/Getty Images, ©Doug Scott/Age Fotostock, ©DK Images, ©Andrew J.Martinez/Photo Researchers, Inc., ©Ralph White/Corbis, ©DK Images, AndyCrawford/©DK Images, Getty Images, ©John Sanford/Photo Researchers,Inc., Adam Benton, ©NOAO/Gatley Merrill/Ressmeyer/Corbis Question 7 Corbis, ©Comstock Inc., Getty Images, ©/Corbis, ©MacduffEverton/Corbis, ©E. Braverman/Getty Images, ©Raymond Gehman/NGS ImageCollection, ©Cornelia Doerr/Age Fotostock, G. Li Causi/A.Ricciardi/A.Garatti/Alessandro Vannini, Rome , Italy Question 8 ©Boden/Ledingham/Masterfile Corporation, ©Lester Lefkowitz/Corbis, ©Andrew Brown; Ecoscene/Corbis, ©Tom Bean/DRK Photo Question 9 ©Tom Uhlman/Visuals Unlimited, Digital Vision, ©Indianapolis Star,Frank Espich/AP/Wide World Photos, ©Hulton-Deutsch Collection/Corbis,DK Images, ©Joseph Van Os/Getty Images, ©Roger Ressmeyer/Corbis Question 10 ©Terry Renna/AP/Wide World Photos, ©David Vaughan/Photo Researchers,Inc., Photo Library, ©DK Images, Royal Museum of Scotland /©DK Images,©Roger Wilmshurst; Frank Lane Picture Agency/Corbis, (C) Getty Images,©Doug Sokell/Visuals Unlimited, ©NOAO/Gatley Merrill/Ressmeyer/Corbis

Interactive Presentation Software Credits
08_g4_ch01_howtoread.flp: 5 ©Gusto Productions/SPL/Photo Researchers, Inc., ©Martha J. Powell/Visuals Unlimited; 08_g4_ch01_mathinscience.flp: 36 (Bkgd) ©Patti Murry/Animals Animals/Earth Scenes, (BL) ©DK Images; 37 (CL, BL) ©DK Images, (BC) Getty Images, (CC) ©John Gerlach/Animals Animals/Earth Scenes, (BR) Jerry Young/©DK Images, (CR) ©Science VU/Visuals Unlimited, (TR) Brand X Pictures; 08_g4_ch01_youarethere.flp: ©Martha J. Powell/Visuals Unlimited; 08_g4_ch02_howtoread.flp: 45 ©George D. Lepp/ Corbis; 08_g4_ch02_mathinscience.flp: 68 (CL) Brand X Pictures, (BL) ©DK Images, (Bkgd) Digital Vision; 08_g4_ch02_youarethere.flp: ©George D. Lepp/Corbis; 08_g4_ch03_howtoread.flp: 77 ©Andrew Brown/Ecoscene/Corbis; 08_g4_ch03_lesson2.flp: 88 (TR) ©Stephen J. Krasemann/DRK Photo, (CC, BR) ©Kennan Ward/Corbis, (CL) ©Michael Llewellyn/Getty Images; 89 (BL) ©Kevin Schafer/Corbis, (TC) Getty Images, (CL) ©Steve Kaufman/Corbis, (BR) ©Michael & Patricia Fogden/Corbis; 08_g4_ch03_lesson3.flp: 92 (BC) British Antarctic Survey/SPL/Photo Researchers, Inc., (BR) ©Royalty-Free/Corbis, (TL) ©W. Perry Conway/Corbis, (BL) ©Roland Birke/Peter Arnold, Inc., (TC) ©Stephen Dalton/NHPA Limited; 93 (TR) ©Joe McDonald/Corbis, (TL) ©Royalty-Free/ Corbis, (CL) ©George D. Lepp/Corbis; 08_g4_ch03_mathinscience.flp: 98 (Bkgd) ©Neil McIntyre/Getty Images, (BL) ©D. 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Motta/University "La Sapienza"/Photo Researchers, Inc.; 157 (TR) ©Susumu Nishinaga/Photo Researchers, Inc., (C) ©Dr. Fred Hossler/Visuals Unlimited; 08_g4_ch05_mathinscience.flp: 164 (B, Bkgd) ©Scott Camazine/Photo Researchers, Inc., (Bkgd) ©Dr. Wolf Fahrenbach/Visuals Unlimited, (BL) ©Tim Flach/Getty Images; 165 Getty Images; 08_g4_ch05_youarethere.flp: (L) ©Dr. Donald Fawcett/Visuals Unlimited, (BC) ©Dr. Richard Kessel & Dr. Randy Kardon/Tissues and Organs/Visuals Unlimited, (CR) ©Prof. P. Motta/Univ. "La Sapienza"/Photo Researchers, Inc.; 08_g4_unita_wrapup.flp: ©Martha J. Powell/Visuals Unlimited, ©George D. Lepp/Corbis, ©Andrew Brown/Ecoscene/Corbis, ©Orion Press/Corbis, ©Dr. Donald Fawcett/Visuals Unlimited, ©Dr. Richard Kessel & Dr. Randy Kardon/Tissues and Organs/Visuals Unlimited, ©Prof. P. Motta/Univ. 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Smith/Corbis; 08_g4_ch15_lesson1.flp: 439 Getty Images; 08_g4_ch15_lesson2.flp: 442 ©DK Images; 443 (C) Jane Burton/©DK Images, (TR) ©DK Images; 08_g4_ch15_lesson3.flp: 448 (BR) ©Michael S. Lewis/Corbis, (TL) ©John Lund/Getty Images, (TL) ©Royalty-Free/Corbis; 449 (TR) ©Royalty-Free/Corbis, (BR) Jane Burton/©DK Images, (BR) ©Bettmann/Corbis, (BR) ©Peter Langone/Getty Images; 08_g4_ch15_mathinscience.flp: 452 ©Lester Lefkowitz/Corbis; 453 ©Connie Ricca/Corbis; 08_g4_ch15_youarethere.flp: ©Scott T. Smith/Corbis; 08_g4_ch16_howtoread.flp: 461 (CR) ©Bob Krist/Corbis, (Bkgd) Digital Vision; 08_g4_ch16_mathinscience.flp: 476 (Bkgd) ©John Noltner/Aurora Photos ©Keith Pritchard/Alamy Images; 08_g4_ch16_youarethere.flp: Digital Vision; 08_g4_unitc_wrapup.flp: ©Kevin Schafer/Getty Images, ©William Taufic/Corbis, ©Byron Aughenbaugh/Getty Images, ©Spencer Jones/Getty Images, ©Scott T. Smith/Corbis, Digital Vision; 08_g4_ch17_howtoread.flp: 493 (CR) GSFC/NASA, (Bkgd) ©David Parker/Photo Researchers, Inc.; 08_g4_ch17_mathinscience.flp: 508 ©Galen Rowell/Corbis; 08_g4_ch17_youarethere.flp: ©David Parker/Photo Researchers, Inc.; 08_g4_ch18_howtoread.flp: 517 (CR) ©Bettmann/Corbis, (Bkgd) ©A. Morton/Photo Researchers, Inc.; 08_g4_ch18_mathinscience.flp: 540 (CL) ©USGS/Photo Researchers, Inc., (CL, BL) JPL/NASA, (CL, BL) Getty Images, (BL) ©Comstock Inc., (BL) NASA, (Bkgd) ©Royalty-Free/Corbis; 08_g4_ch18_youarethere.flp: ©A. Morton/Photo Researchers, Inc.; 08_g4_ch19_howtoread.flp: 549 (CR) ©Stevie Grand/Photo Researchers, Inc., (Bkgd) ©Tibor Bognar/Corbis; 08_g4_ch19_lesson1.flp: 552 (BL) ©J. Burgess/Photo Researchers, Inc.; 552 (TL) ©Donald Specker/Animals Animals/Earth Scenes, (CR) Getty Images; 553 Getty Images; 08_g4_ch19_mathinscience.flp: 562 (Bkgd) ©Roger Ball/Corbis, (BL) ©General Motors Corp. used with permission, GM Media Archives, (BC) Hughes Electronics Corporation; 08_g4_ch19_youarethere.flp: ©Tibor Bognar/Corbis; 08_g4_unitd_wrapup.flp: : ©David Parker/Photo Researchers, Inc., ©A. Morton/Photo Researchers, Inc., ©Tibor Bognar/Corbis.

Interactive Presentation Software Credits - Florida
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Krasemann/DRK Photo, (CC, BR) ©Kennan Ward/Corbis, (CL) ©Michael Llewellyn/Getty Images; 89 (BL) ©Kevin Schafer/Corbis, (TC) Getty Images, (CL) ©Steve Kaufman/Corbis, (BR) ©Michael & Patricia Fogden/Corbis; fl_ch03_lesson3.flp: 92 (BC) British Antarctic Survey/SPL/Photo Researchers, Inc., (BR) ©Royalty-Free/Corbis, (TL) ©W. Perry Conway/Corbis, (BL) ©Roland Birke/Peter Arnold, Inc., (TC) ©Stephen Dalton/NHPA Limited; 93 (TR) ©Joe McDonald/Corbis, (TL) ©Royalty-Free/ Corbis, (CL) ©George D. Lepp/Corbis; fl_ch03_mathinscience.flp: 98 (Bkgd) ©Neil McIntyre/Getty Images, (BL) ©D. 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Martinez/Photo Researchers, Inc.; fl_ch08_youarethere.flp: ©Adam Jones/Photo Researchers, Inc.; fl_ch09_howtoread.flp: 261 (CR) ©Owaki-Kulla/Corbis, (Bkgd) ©Art Wolfe/Getty Images; fl_ch09_mathinscience.flp: 276 (Bkgd) ©James Balog/Getty Images, (BR) ©Baron Wolman/ Getty Images; 277 ©David Weintraub/Science Source/Photo Researchers, Inc.; fl_ch09_youarethere.flp: ©Art Wolfe/Getty Images; fl_ch10_howtoread.flp: 285 ©Layne Kennedy/Corbis; fl_ch10_mathinscience.flp: 300 (Bkgd) ©Royalty-Free/Corbis, (BR, BC) Getty Images, (CC) ©Frederik Astier/ Sygma/Corbis, (CL) Brand X Pictures; fl_ch10_youarethere.flp: ©Layne Kennedy/Corbis; fl_unitb_wrapup.flp: ©Earth Satellite Corporation/Photo Researchers, Inc., ©Reuters/Corbis, ©Adam Jones/Photo Researchers, Inc., ©Art Wolfe/Getty Images, ©Layne Kennedy/Corbis; fl_ch11_howtoread.flp: 317 ©Kevin Schafer/Getty Images; fl_ch11_mathinscience.flp: 340 (R) ©Richard Megna/Fundamental Photographs, (Bkgd) ©Richard Laird/Getty Images, (B) ©Martin Keller/Corbis; fl_ch11_youarethere.flp: ©Kevin Schafer/Getty Images; fl_ch12_howtoread.flp: 349 (CR) Getty Images, (Bkgd) ©William Taufic/Corbis; fl_ch12_mathinscience.flp: 362 (B) Getty Images, (T) ©Christoph Burki/Getty Images; 363 ©Paul Seheult/Eye Ubiquitous/Corbis; fl_ch12_youarethere.flp: ©William Taufic/Corbis; fl_ch13_howtoread.flp: 373 ©Byron Aughenbaugh/Getty Images; fl_ch13_mathinscience.flp: 396 Age Fotostock; fl_ch13_youarethere.flp: ©Byron Aughenbaugh/Getty Images; fl_ch14_howtoread.flp: 405 (CR) Getty Images, (Bkgd) ©Spencer Jones/Getty Images; fl_ch14_mathinscience.flp: 428 (CL) ©Steve Taylor/Getty Images, (BL) Getty Images, (BL, CL) AP/Wide World Photos, (Bkgd) ©Ulf Wallin/Getty Images, (BL) Corbis, (CL) ©Alan Smith/Getty Images; 429 AP/Wide World Photos; fl_ch14_youarethere.flp: ©Spencer Jones/Getty Images; fl_ch15_howtoread.flp: 437 ©Scott T. Smith/Corbis; fl_ch15_lesson1.flp: 439 Getty Images; fl_ch15_lesson2.flp: 442 ©DK Images; 443 (C) Jane Burton/©DK Images, (TR) ©DK Images; fl_ch15_lesson3.flp: 448 (BR) ©Michael S. Lewis/Corbis, (TL) ©John Lund/Getty Images, (TL) ©Royalty-Free/Corbis; 449 (TR) ©Royalty-Free/Corbis, (BR) Jane Burton/©DK Images, (BR) ©Bettmann/Corbis, (BR) ©Peter Langone/Getty Images; fl_ch15_youarethere.flp: ©Scott T. Smith/Corbis; fl_ch16_howtoread.flp: 461 (CR) ©Bob Krist/Corbis, (Bkgd) Digital Vision; fl_ch16_youarethere.flp: Digital Vision; fl_unitc_wrapup.flp: ©Kevin Schafer/Getty Images, ©William Taufic/Corbis, ©Byron Aughenbaugh/Getty Images, ©Spencer Jones/Getty Images, ©Scott T. Smith/Corbis, Digital Vision; fl_ch17_howtoread.flp: 493 (CR) GSFC/NASA, (Bkgd) ©David Parker/Photo Researchers, Inc.; fl_ch17_mathinscience.flp: 508 ©Galen Rowell/Corbis; fl_ch17_youarethere.flp: ©David Parker/Photo Researchers, Inc.; fl_ch18_howtoread.flp: 517 (CR) ©Bettmann/Corbis, (Bkgd) ©A. Morton/Photo Researchers, Inc.; fl_ch18_mathinscience.flp: 540 (CL) ©USGS/Photo Researchers, Inc., (CL, BL) JPL/NASA, (CL, BL) Getty Images, (BL) ©Comstock Inc., (BL) NASA, (Bkgd) ©Royalty-Free/Corbis; fl_ch18_youarethere.flp: ©A. Morton/Photo Researchers, Inc.; fl_ch19_howtoread.flp: 549 (CR) ©Stevie Grand/Photo Researchers, Inc., (Bkgd) ©Tibor Bognar/Corbis; fl_ch19_mathinscience.flp: 562 (Bkgd) ©Roger Ball/Corbis, (BL) ©General Motors Corp. used with permission, GM Media Archives, (BC) Hughes Electronics Corporation; fl_ch19_youarethere.flp: ©Tibor Bognar/Corbis; fl_unitd_wrapup.flp: : ©David Parker/Photo Researchers, Inc., ©A. Morton/Photo Researchers, Inc., ©Tibor Bognar/Corbis.

Grade 5

Active Glossary Credits
air sacs : Leonello Calvetti; aquifer : Studio Liddell; artery : Leonello Calvetti; asteroid : ©JPL/TSADO/Tom Stack & Associates, Inc.; biomass : ©Steve Terrill/Corbis; bronchioles : Leonello Calvetti; capillary : Leonello Calvetti; carnivore : ©Randy Wells/Corbis; cell membrane : Robert Ulrich; cell respiration : Tony Randazzo; cell wall : Robert Ulrich; chemical change : ©DK Images; chemical equation : Patrick Gnan; chemical weathering : ©Angelo Homak/Corbis, ©Historical Picture Archive/Corbis; chloroplast : Robert Ulrich; class: ©Darren Bennett/Animals Animals/Earth Scenes, Jerry Young/DK Images, ©Darrell Gulin/Corbis, DK Images; climate : Daniel J. Cox/Natural Exposures; community : Peter Johnson/Corbis; compare : ©DK Images; constellation : ©Roger Ressmeyer/Corbis; consumer : Peter Johnson/Corbis; contrast: ©DK Images; convection current : Studio Liddell; core : Big Sesh Studios; crust : Big Sesh Studios; cycle : Peter Bollinger; cytoplasm : Tony Randazzo; decomposer : ©Jim Brandenburg/Minden Pictures; earthquake : Alan Male; ecosystem : ©Andrew Brown;Ecoscene/Corbis; electromagnet : Science Museum/©DK Images; electromagnetic radiation :©L. Bassett/Visuals Unlimited, Alfred Pasieka/Photo Researchers, Inc.,Getty Images, ©Anthony Meshkinyar/Getty Images, ©RogerRessmeyer/Corbis, ©Miles Ertman/Masterfile Corporation; element : ©Larry Stepanowicz/Visuals Unlimited; embryo : ©Geoff Dann/DK Images; energy pyramid : Neli Flecher and Matthew Ward/©DK Images, ©Michael Quinton/Minden Pictures, Matthew Ward/©DK Images; environment : Melissa Farlow/Aurora & Quanta Productions, ©DK Images, ©Kurt Stier/Corbis; esophagus : ©SPL/Photo Researchers, Inc.; food chain : Neil Fletcher and Matthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/Getty Images; food web :©DK Images, ©Michael Sewell/Peter Arnold, Inc., Neil Fletcher andMatthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/GettyImages, ©Tom Shaw/Tom Stack & Associates, Inc., Getty Images,Michael Quinton/Minden Pictures; fossil : Alan Male; fossil fuel : Tony Randazzo; front : ©DK Images; galaxy : KSC/NASA; geothermal : Tony Randazzo; habitat : Clem Haagner; Gallo Images/Corbis; hydroelectric : Tony Randazzo; igneous rock : Alan Male; inertia : ©DK Images; inherit: ©Manoj Shah/Animals Animals /Earth Scenes; inventor : ©Bettmann/Corbis, The Granger Collection, NY; invertebrate: ©Jerry Young/DK Images, ©Peter Steiner/Corbis, ©Philip JamesCorwin/Corbis, ©Andrew Syred/Photo Researchers, Inc., ©DK Images, ©F.J.Jackson/Robert Harding Picture Library Ltd., Dave King/DK Images; kingdom :©Kennan Ward/Corbis, ©DK Images, ©Darrell Gulin/Corbis, ©DarrenBennett/Animals Animals/Earth Scenes, ©D. Robert & LorriFranz/Corbis, Jerry Young/DK Images; life cycle : ©DK Images; light: ©Maxine Hall/Corbis, ©Adina Tovy/Robert Harding Picture Library Ltd.; light-year : ©Edinburgh Royal Observatory/Photo Researchers, Inc.; machine : Getty Images; making operational definitions : ©DK Images; mantle : Big Sesh Studios; manufacturing : ©Peter Yates/Corbis; matter : Big Sesh Studios, ©DK Images; metamorphic rock : ©DK Images, Mike Dunning/©DK Images; microchip : Clive Streeter/Courtesy of The Science Museum/©DK Images; microscopic : Jeff Mangiat; mitochondria : Robert Ulrich; moon : JPL/NASA; Moon phase : Paul Oglesby; mucus : Leonello Calvetti; mutation : ©Gerry Ellis/Minden Pictures; nebula : Getty Images; neutron : ; niche : ©Raymond Gehman/Corbis; nonrenewable resource : ©Charles E. Rotkin/Corbis; nucleus : Robert Ulrich; organ : Big Sesh Studios; organ system : Big Sesh Studios; organism : ©Ken Cole/Animals Animals/Earth Scenes, Getty Images; phloem : Grunk/Schoenberger/Grant Heilman Photography, Inc.; photosynthesis : Jeff Mangiat; phylum : ©DK Images, ©Darrell Gulin/Corbis, Jerry Young/©DK Images, ©Darren Bennett/Animals Animals/Earth Scenes; plate : David Preiss; pollen : DK Images, ©Steve Maslowski/Photo Researchers, Inc., ©Susumu Nishinaga/Photo Researchers, Inc.; pollination : Corbis; pollution : Getty Images; polymer : ©DK Images; population : ©Neil McIntyre/Getty Images; precipitation : ©Stone/Getty Images; predator : ©William Bernard/Corbis, ©Gail Shumway/Getty Images; predict/predicting : ©Roy Rainford/Robert Harding Picture Library, Ltd.; prey : Jane Burton/©DK Images, ©Daniel Cox/Getty Images; producer : ©Randy Morse/Animals Animals/Earth Scenes; protist : ©Eric Grave/Phototake; radiation : Robert Kayganich; renewable resource : ©Arthur Rothstein/Corbis; reservoir : ©Paul Linse/Corbis; resource : ©Charles O'Rear/Corbis; salinity : ©David Pu'u/Corbis; satellite: ©David Ducros/Photo Researchers, Inc.; sedimentary rock : ©DK Images, Colin Keates/Courtesy of the Natural History Museum/©DK Images; sequence : ©Charles Melton/Visuals Unlimited, ©Brad Morgan/Visuals Unlimited, ©Dick Scott/Visuals Unlimited, ©DK Images; solar energy : ©Kevin Burke/Getty Images; solar system : ©NASA/Photo Researchers, Inc.; space probe : JPL/NASA; space station : NASA; species : Jerry Young/©DK Images; spore : ©Ted Horowitz/Corbis; stamen : ©Royalty-Free/Corbis; star : ©Roger Ressmeyer/Corbis; supernova : ©ESA/NASA/P. Anders/Corbis; system : Leonello Calvetti, ©Lester Lefkowitz/Corbis; technology :Peter Anderson/©DK Images, ©Science Museum/Science & SocietyPicture Library, Getty Images, Stepen Oliver/©DK Images, ©AppleComputers, Inc.; tissue : Leonello Calvetti; topography : ©Brian Sytnyk/Masterfile Corporation; universe : ©Royalty-Free/Corbis; vacuole : Robert Ulrich; valve : ©Jean Claude Revy-ISM/Phototake; vein : Leonello Calvetti; vertebrate : ©DK Images, Jerry Young/©DK Images; water cycle : Peter Bollinger; water table: Studio Liddell; weathering : Natural History Museum/©DK Images, ©Jeremy Horner/Corbis; World Wide Web : Getty Images; xylem : Grunk/Schoenberger/Grant Heilman Photography, Inc.

Active Glossary Credits - California
acid : ©Clive Streeter/DK Images; air sacs : Leonello Calvetti; alloy : ©DK Images, ©Mark Schneider/Visuals Unlimited; aqueduct : ©Dennis Degnan/Corbis; aquifer : Studio Liddell; array : Photo taken with Digital Instruments Nanoscope® SPM courtesy of Veeco Instruments, Inc., Santa Barbara, CA; artery : Leonello Calvetti; asteroid : ©JPL/TSADO/Tom Stack & Associates, Inc.; atmospheric pressure: ©Paul Seheult/Corbis; atrium : Big Sesh Studios; base: ©Scott T. Smith/Corbis, DK Images; bladder: Leonello Calvetti; blood vessels : Leonello Calvetti; brittle : ©DK Images; bronchi : Leonello Calvetti; bronchiole : Leonello Calvetti; capillary : Leonello Calvetti; cell : Robert Ulrich; cell wall : Robert Ulrich; cellular respiration : Tony Randazzo; chemical change : ©DK Images; chemical equation : Patrick Gnan; chemical property: ©Diane Schiumo/Fundamental Photographs; chlorophyll : Robert Ulrich; chloroplast : Robert Ulrich; cilia: ©Susumu Nishinaga/Photo Researchers, Inc.; circulatory system : Peter Bollinger; colon : Jeff Mangiat; convection current : Studio Liddell; crystal : ©DK Images; cyclone : Corbis; dew : Aflo Foto Agency; digestion: Jeff Mangiat; digestive system : Jeff Mangiat; ductile: ©Wally Eberhart/Visuals Unlimited, ©David Wrobel/Visuals Unlimited; El Niño: JPL/NASA Image Exchange; element : ©Larry Stepanowicz/Visuals Unlimited; esophagus : ©SPL/Photo Researchers, Inc.; excretory system : Leonello Calvetti; fog: ©James A. Sugar/Corbis; front : ©DK Images; frost : ©Gary W. Carter/Visuals Unlimited; glacier : ©K. Gilham/Robert Harding Picture Library Ltd.; glucose: ©Charles D. Winters/Photo Researchers, Inc., Spencer Jones/Getty Images; groundwater : Studio Liddell; hail : ©George Post/Photo Researchers, Inc.; heart chambers : Big Sesh Studios; humidity : ©DK Images; hydrologic cycle : Peter Bollinger; hydrosphere: GSFC/NOAA/NASA Image Exchange; hygrometer: Karl Shone/©DK Images; kidney : Leonello Calvetti; large intestine : Jeff Mangiat; lightning : Greg Harris; metal : Jupiter Images, ©Mark A. Schneider/Visuals Unlimited; metalloid : ©Richard Megna/Fundamental Photographs; mitochondria : Robert Ulrich; monsoon: ©Ben Spencer/Eye Ubiquitous/Corbis; mucus : Leonello Calvetti; multicellular: Natural History Museum/©DK Images, ©DK Images; neutron : ; nucleus (2) : Robert Ulrich; observe: ©Darrell Guilin/Corbis; organ : Big Sesh Studios; organ system : Big Sesh Studios; phloem : Grunk/Schoenberger/Grant Heilman Photography, Inc.; photosynthesis : Jeff Mangiat; polar region : Robert Kayganich; precipitation : ©Stone/Getty Images; radar: ©David R. Frazier/Photo Researchers, Inc.; reclamation: ©Michael Beiriger/Alamy; recycle : ©Royalty-Free/Corbis, ©Pete Soloutus/Corbis, ©Eric Fowke/PhotoEdit; reservoir : ©Paul Linse/Corbis; respiratory system : Jeff Mangiat; runoff: ©Claver Carroll/Photo Library; salinity : ©David Pu'u/Corbis; salt : ©DK Images, ©Paul Silverman/Fundamental Photographs; satellite: ©David Ducros/Photo Researchers, Inc.; sea level: ©DK Images; sequence : ©Charles Melton/Visuals Unlimited, ©Brad Morgan/Visuals Unlimited, ©Dick Scott/Visuals Unlimited, ©DK Images; severe weather : ©A. & J. Verkaik/Corbis; small intestine : Jeff Mangiat; solar system : ©NASA/Photo Researchers, Inc.; star : ©Roger Ressmeyer/Corbis; telegraph: Getty Images; tempered : Studio Liddell; tissue : Leonello Calvetti; urine: Leonello Calvetti; vacuole : Robert Ulrich; valve : ©Jean Claude Revy-ISM/Phototake; vascular : ©DK Images, ©Runk/Schoenberger/Grant Heilman Photography; vein : Leonello Calvetti; ventricle: Big Sesh Studios; villi : ©Susumu Nihinaga/Photo Researchers, Inc.; water cycle : Peter Bollinger; water table: Studio Liddell; watershed: Matt Zang; xylem : Grunk/Schoenberger/Grant Heilman Photography, Inc.

Active Art
Solar System: ©GettyImages, Mariner 10/NASA, Pioneer Venus Orbiter/NASA, VoyagerI/NASA/NSSDC, NASA and the Hubble Heritage Team (STScl/AURA)/HubbleSpace Telescope WFPC2/STScl-PRC01-15, NASA/NSSDC (Image Processing byJody Swann/Tammy Becker/Alfred McEwen using the PICS [Planetary ImageCartography System] image processing system developed at the U.S.Geological Survey in Flagstaff, Arizona), Apollo 17 Crew/NASA, E.Karkoschka et al. (University of Arizona)/NICMOS/HST/NASA, Dr. R.Albrecht (ESA/ESO)/NASA, Voyager II/NASA.
Observing Objects:©Getty Images, Mariner 10/NASA, Pioneer Venus Orbiter/NASA, VoyagerI/NASA/NSSDC, NASA and the Hubble Heritage Team (STScl/AURA)/HubbleSpace Telescope WFPC2/STScl-PRC01-15, NASA/NSSDC (Image Processing byJody Swann/Tammy Becker/Alfred McEwen using the PICS [Planetary ImageCartography System] image processing system developed at the U.S.Geological Survey in Flagstaff, Arizona)

Games
Nanoboy: Courtesy IBM Corporation. Carbon illustrations, Tony Randazzo. Name That Mineral!: DK Images, Colin Keates/Courtesy of the Natural History Museum, London/DK Images. Build a Food Web:DK Images, Stephen Krasemann/NHPA Limited, Jim Zipp/Photo Researchers,Inc., Joe McDonald/Corbis, © Royalty-Free/Corbis, ©Gail Shumway/GettyImages. Ecosystems: ©J. Eastcott/Y. Eastcott Film/NGSImage Collection, ©Enzo & Paolo Ragazzini/Corbis, ©AndyBinns/Ecoscene, ©Jim Zipp/Photo Researchers, Inc.

Active Glossary Credits - Spanish
acuífero : Studio Liddell; alvéolos : Leonello Calvetti; ambiente : Melissa Farlow/Aurora & Quanta Productions, ©DK Images, ©Kurt Stier/Corbis; año luz : ©Edinburgh Royal Observatory/Photo Researchers, Inc.; arteria : Leonello Calvetti; asteroide : ©JPL/TSADO/Tom Stack & Associates, Inc.; biomasa : ©Steve Terrill/Corbis; bronquiolos : Leonello Calvetti; cadena alimentaria : Neil Fletcher and Matthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/Getty Images; cambio químico : ©DK Images; capa freática : Studio Liddell; capilar : Leonello Calvetti; carnívoro : ©Randy Wells/Corbis; ciclo : Peter Bollinger; ciclo de vida: ©DK Images; ciclo del agua : Peter Bollinger; citoplasma : Tony Randazzo; clase : ©Darren Bennett/Animals Animals/Earth Scenes, Jerry Young/DK Images, ©Darrell Gulin/Corbis, DK Images; clima : Daniel J. Cox/Natural Exposures; cloroplasto : Robert Ulrich; combustible fósil : Tony Randazzo; comparar : ©DK Images; comunidad : Peter Johnson/Corbis; constelación : ©Roger Ressmeyer/Corbis; consumidor : Peter Johnson/Corbis; contaminación : Getty Images; contrastar : ©DK Images; corriente de convección : Studio Liddell; corteza terrestre : Big Sesh Studios; descomponedor : ©Jim Brandenburg/Minden Pictures; ecosistema : ©Andrew Brown;Ecoscene/Corbis; ecuación química : Patrick Gnan; electroimán : Science Museum/©DK Images; elemento : ©Larry Stepanowicz/Visuals Unlimited; embalse : ©Paul Linse/Corbis; embrión : ©Geoff Dann/DK Images; energía solar : ©Kevin Burke/Getty Images; esófago : ©SPL/Photo Researchers, Inc.; especie : Jerry Young/©DK Images; espora : ©Ted Horowitz/Corbis; estación espacial : NASA; estambre : ©Royalty-Free/Corbis; estrella : ©Roger Ressmeyer/Corbis; fases de la Luna : Paul Oglesby; fílum : ©DK Images, ©Darrell Gulin/Corbis, Jerry Young/©DK Images, ©Darren Bennett/Animals Animals/Earth Scenes; floema : Grunk/Schoenberger/Grant Heilman Photography, Inc.; fósil : Alan Male; fotosíntesis : Jeff Mangiat; frente : ©DK Images; galaxia : KSC/NASA; geotérmica : Tony Randazzo; hábitat : Clem Haagner; Gallo Images/Corbis; heredado : ©American Images Inc./Getty Images; hidroeléctrica : Tony Randazzo; inercia : ©DK Images; inventor : ©Bettmann/Corbis, The Granger Collection, NY; invertebrados :©Jerry Young/DK Images, ©Peter Steiner/Corbis, ©Philip JamesCorwin/Corbis, ©Andrew Syred/Photo Researchers, Inc., ©DK Images, ©F.J.Jackson/Robert Harding Picture Library Ltd., Dave King/DK Images; luz : ©Maxine Hall/Corbis, ©Adina Tovy/Robert Harding Picture Library Ltd.; manto terrestre : Big Sesh Studios; manufacturar : ©Peter Yates/Corbis; máquina : Getty Images; materia : Big Sesh Studios, ©DK Images; membrana celular : Robert Ulrich; meteorización : Natural History Museum/©DK Images, ©Jeremy Horner/Corbis; meteorización química : ©Angelo Homak/Corbis, ©Historical Picture Archive/Corbis; microchip : Clive Streeter/Courtesy of The Science Museum/©DK Images; microscópico : Jeff Mangiat; mitocondrias : Robert Ulrich; mucosidad : Leonello Calvetti; mutación : ©Gerry Ellis/Minden Pictures; nebulosa : Getty Images; neutrón : ; nicho ecológico : ©Raymond Gehman/Corbis; núcleo (celular) : Robert Ulrich; núcleo (terrestre) : Big Sesh Studios; organismo : ©Ken Cole/Animals Animals/Earth Scenes, Getty Images; órgano : Big Sesh Studios; pared celular : Robert Ulrich; pirámide de energía : Neli Flecher and Matthew Ward/©DK Images, ©Michael Quinton/Minden Pictures, Matthew Ward/©DK Images; placa : David Preiss; plantear definiciones operativas : ©DK Images; población : ©Neil McIntyre/Getty Images; polen : DK Images, ©Steve Maslowski/Photo Researchers, Inc., ©Susumu Nishinaga/Photo Researchers, Inc.; polímero : ©DK Images; polinización : Corbis; precipitación : ©Stone/Getty Images; predador : ©William Bernard/Corbis, ©Gail Shumway/Getty Images; predecir : ©Roy Rainford/Robert Harding Picture Library, Ltd.; presa : Jane Burton/©DK Images, ©Daniel Cox/Getty Images; productor : ©Randy Morse/Animals Animals/Earth Scenes; protista : ©Eric Grave/Phototake; radiación : Robert Kayganich; radiación electromagnética :©L. Bassett/Visuals Unlimited, Alfred Pasieka/Photo Researchers, Inc.,Getty Images, ©Anthony Meshkinyar/Getty Images, ©RogerRessmeyer/Corbis, ©Miles Ertman/Masterfile Corporation; recurso : ©Charles O'Rear/Corbis; recurso no renovable : ©Charles E. Rotkin/Corbis; recurso renovable : ©Arthur Rothstein/Corbis; red alimentaria :©DK Images, ©Michael Sewell/Peter Arnold, Inc., Neil Fletcher andMatthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/GettyImages, ©Tom Shaw/Tom Stack & Associates, Inc., Getty Images,Michael Quinton/Minden Pictures; reino : ©KennanWard/Corbis, ©DK Images, ©Darrell Gulin/Corbis, ©Darren Bennett/AnimalsAnimals/Earth Scenes, ©D. Robert & Lorri Franz/Corbis, JerryYoung/DK Images; roca ígnea : Alan Male; roca metamórfica : ©DK Images, Mike Dunning/©DK Images; roca sedimentaria : ©DK Images, Colin Keates/Courtesy of the Natural History Museum/©DK Images; salinidad : ©David Pu'u/Corbis; satélite : ©David Ducros/Photo Researchers, Inc.; secuencia : ©Charles Melton/Visuals Unlimited, ©Brad Morgan/Visuals Unlimited, ©Dick Scott/Visuals Unlimited, ©DK Images; sistema : Leonello Calvetti, ©Lester Lefkowitz/Corbis; sistema de órganos : Big Sesh Studios; sistema solar : ©NASA/Photo Researchers, Inc.; sonda espacial : JPL/NASA; supernova : ©ESA/NASA/P. Anders/Corbis; tecnología :Peter Anderson/©DK Images, ©Science Museum/Science & SocietyPicture Library, Getty Images, Stepen Oliver/©DK Images, ©AppleComputers, Inc.; tejido : Leonello Calvetti; terremoto : Alan Male; topografía : ©Brian Sytnyk/Masterfile Corporation; universo : ©Royalty-Free/Corbis; vacuola : Robert Ulrich; válvula : ©Jean Claude Revy-ISM/Phototake; vena : Leonello Calvetti; vertebrado : ©DK Images, Jerry Young/©DK Images; World Wide Web : Getty Images; xilema : Grunk/Schoenberger/Grant Heilman Photography, Inc.

Science Games
Question 1 ©The Image Bank/Getty Images, ©DK Images,Geoff Moon/Frank Lane Picture Agency/Corbis, ©Ric Ergenbright/Corbis,Getty Images, ©Michael & Patricia Fogden/Corbis, ©John Lund/Corbis,©G. Renner/Robert Harding Picture Library Ltd., ©Robb DeWall, ©SteveMaslowski/Photo Researchers, Inc., Jerry Young/©DK Images, GettyImages, Brand X Pictures, ©Tony Freeman/PhotoEdit, ©David Parker/PhotoResearchers, Inc., ©Kaz Mori/Getty Images, ©Dan Chung/Reuters/Landov,LLC, ©Ron Thomas/Getty Images, ©Gerald L. Kooyman/Animals Animals/EarthScenes, The Granger Collection, NY, (TR) ©Bruce Burkhardt/Corbis Question 2 ©Taxi/Getty Images, ©Royalty-Free/Corbis, Getty Images, ©William J.Weber/Visuals Unlimited, ©Ted Levin/Animals Animals/Earth Scenes,©Garry Black/Masterfile Corporation, Daniel J. Cox/NaturalExposures.com, ©David Ulmer/Stock Boston, ©Claus Meyer/Minden Pictures,©Yva Momatiuk/John Eastcott/Minden Pictures, ©Paul Almasy/Corbis, ©AlanSchein Photography/Corbis, ©Royalty-Free/Corbis, ©David Paynter/AgeFotostock Question 3 ©J. & B.Photographers/Animals Animals/Earth Scenes, S. PurdyMatthews/Stone/Getty Images, Alan G. Nelson/Animals Animals/EarthScenes, ©Taxi/Getty Images, ©Brand X Pictures/Getty Images, ©The ImageBank/Getty Images, Flip Nicklin/Minden Pictures, ©Carol Havens/Corbis,©Leonard Lessin/Peter Arnold, Inc., ©DK Images, Stephen Frink/Corbis,©Paulo De Oliviera/Animals Animals/Earth Scenes, ©DK Images,©Fotopic/Index Stock Imagery, ©Jose Fuste Raga/eStock Photo,©Duomo/Corbis, Getty Images, Bob Langrish/©DK Images, ©KevinAitken/Peter Arnold, Inc., ©Chris Newbert/Minden Pictures Question 4 ©Tom Brakefield/Corbis, ©Mark L. Stephenson/Corbis, Courtesy of theLondon Toy and Model Museum, Paddington, London/©DK Images, DK Images,Pete Atkinson/NHPA Limited, ©James Watt/Animals Animals/Earth Scenes,Kent Wood/Photo Researchers, Inc., ©Joe McDonald/Corbis, ©RodPlanck/Photo Researchers, Inc., ©Royalty-Free/Corbis, ©RogerRessmeyer/Corbis, ©/Corbis, ©Tom Bean/Corbis, ©YannArthus-Bertrand/Corbis, Getty Images, ©Roger Leo/Index Stock Imagery,Jerry Young/©DK Images, Daniel J. Cox/Daniel J. Cox/Natural Exposures,©Frans Lanting/Minden Pictures, ©Manfred Danegger/Photo Researchers,Inc., ©Zigmund Leszczynski/Animals Animals/Earth Scenes, ©Michael andPatricia Fogden/Corbis, Alan G. Nelson/Animals Animals/Earth Scenes,©Sumio Harada/Minden Pictures, ©John Stern/Animals Animals/Earth ScenesQuestion 5 ©The Image Bank/Getty Images, ©HollyHarris/Getty Images, ©Taxi/Getty Images, ©Richard Megna/FundamentalPhotographs, Dave King/Pitt Rivers Museum/University of Oxford,Oxford/©DK Images, ©DK Images, ©Gary W. Carter/Corbis, ©RolfKopfle/Bruce Coleman Inc., ©DK Images, ©Tom Uhlman/Visuals Unlimited,©DK Images, ©Arnulf Husmo/Getty Images5 ©Joseph Sohm/ChromoSohmInc./Corbis, ©GSFC/NASA Image Exchange, ©JPL/NASA, ©ArielSkelley/Corbis Question 6 ©Julie Eggers/BruceColeman Inc., ©Steve Solum/Bruce Coleman Inc., ©Comstock Inc.,©Stone/Getty Images, ©Doug Scott/Age Fotostock, ©DK Images, ©Andrew J.Martinez/Photo Researchers, Inc., ©Ralph White/Corbis, ©DK Images, AndyCrawford/©DK Images, Getty Images, ©John Sanford/Photo Researchers,Inc., Adam Benton, ©NOAO/Gatley Merrill/Ressmeyer/Corbis Question 7 Corbis, ©Comstock Inc., Getty Images, ©/Corbis, ©MacduffEverton/Corbis, ©E. Braverman/Getty Images, ©Raymond Gehman/NGS ImageCollection, ©Cornelia Doerr/Age Fotostock, G. Li Causi/A.Ricciardi/A.Garatti/Alessandro Vannini, Rome , Italy Question 8 ©Boden/Ledingham/Masterfile Corporation, ©Lester Lefkowitz/Corbis, ©Andrew Brown; Ecoscene/Corbis, ©Tom Bean/DRK Photo Question 9 ©Tom Uhlman/Visuals Unlimited, Digital Vision, ©Indianapolis Star,Frank Espich/AP/Wide World Photos, ©Hulton-Deutsch Collection/Corbis,DK Images, ©Joseph Van Os/Getty Images, ©Roger Ressmeyer/Corbis Question 10 ©Terry Renna/AP/Wide World Photos, ©David Vaughan/Photo Researchers,Inc., Photo Library, ©DK Images, Royal Museum of Scotland /©DK Images,©Roger Wilmshurst; Frank Lane Picture Agency/Corbis, (C) Getty Images,©Doug Sokell/Visuals Unlimited, ©NOAO/Gatley Merrill/Ressmeyer/Corbis

Interactive Presentation Software Credits
08_g5_ch01_howtoread.flp: 5 (Bkgd) ©Jim Brandenburg/Minden Pictures, ©DK Images; 08_g5_ch01_lesson3.flp: 1 (TC) ©Tony Wharton/Frank Lane Picture Agency/Corbis, (TL, TR) ©DK Images; 08_g5_ch01_mathinscience.flp: 28 (Bkgd) ©Ralph A. Clevenger/Corbis, (TR) ©Michael Durham; 29 (TL) Colin Keates/Courtesy of the Natural History Museum, London/©DK Images, (TC) ©DK Images, (TR) ©Chassenet/Photo Researchers, Inc.; 08_g5_ch01_youarethere.flp: (C) ©Jim Brandenburg/Minden Pictures, (BL) ©Michael Melford/NGS Image Collection; 08_g5_ch02_howtoread.flp: 37 (Bkgd) ©Michael Webb/Visuals Unlimited, (CR) ©NCI/Photo Researchers, Inc.; 08_g5_ch02_mathinscience.flp: 52 (Bkgd) ©Quest/Photo Researchers, Inc., (Bkgd) ©Dr. Fred Hossler/Visuals Unlimited; 08_g5_ch02_youarethere.flp: ©Michael Webb/Visuals Unlimited; 08_g5_ch03_howtoread.flp: 61 (Bkgd) ©Lester Lefkowitz/Corbis, ©Michael Webb/Visuals Unlimited; 08_g5_ch03_mathinscience.flp: 82 (C) ©BodyOnline/Getty Images, (BL, BR, BCR) Getty Images; 08_g5_ch03_youarethere.flp: ©Lester Lefkowitz/ Corbis; 08_g5_ch04_howtoread.flp: 3 ©John Durham/Photo Researchers, Inc.; 08_g5_ch04_mathinscience.flp: 116 ©Abrams/ Lacagnina/Getty Images; 08_g5_ch05_howtoread.flp: 125 (CR) ©DK Images, (Bkgd) ©Larry Michael/Nature Picture Library; 08_g5_ch05_mathinscience.flp: 156 ©Chris Newbert/Minden Pictures; 08_g5_ch05_youarethere.flp: (CL, CR) ©D. Robert & Lorri Franz/Corbis, (Bkgd) ©Larry Michael/Nature Picture Library; 08_g5_ch06_howtoread.flp: 165 ©Michael & Patricia Fogden/Minden Pictures; 08_g5_ch06_mathinscience.flp: 180 ©Andrew Parkinson/Nature Picture Library; 08_g5_ch06_youarethere.flp: (T, BR) ©DK Images, ©Mitsuhiko Imamori/Minden Pictures; 08_g5_unita_wrapup.flp: (C) ©Jim Brandenburg/Minden Pictures, (BL) ©Michael Melford/NGS Image Collection, ©Michael Webb/Visuals Unlimited, ©Lester Lefkowitz/ Corbis, (CL, CR) ©D. 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Copley/Visuals Unlimited, (CL) ©Ken Lucas/ Visuals Unlimited, (TC, CR) ©Mark Schneider/Visuals Unlimited, (CC) ©William Weber/Visuals Unlimited, (TR) ©Carolina Biological/ Visuals Unlimited; 08_g5_ch09_youarethere.flp: ©Raymond Gehman/NGS Image Collection; 08_g5_ch10_howtoread.flp: 301 (Bkgd) ©Gerry Ellis/Minden Pictures, ©Pat J. Groves/Ecoscene/ Corbis; 08_g5_ch10_lesson1.flp: 305 ©Natalie Fobes/ Corbis; 08_g5_ch10_lesson2.flp: 306 ©Grafton Marshall/Corbis; 307 (CR) ©Chinch Gryniewicz/ Corbis, (TR) ©Reuters/ Corbis; 08_g5_ch10_mathinscience.flp: 324 ©Richard Hamilton Smith/Corbis; 08_g5_ch10_youarethere.flp: ©Gerry Ellis/Minden Pictures; 08_g5_unitb_wrapup.flp: ©David Pu’u/Corbis, ©Chris Noble/Getty Images, ©Raymond Gehman/NGS Image Collection, ©Gerry Ellis/Minden Pictures; 08_g5_ch11_howtoread.flp: 341 (Bkgd) Courtesy of Stanford Linear Accelerator Center, (CR) ©Roger Tully/Getty Images; 08_g5_ch11_mathinscience.flp: 364 ©David Taylor/Photo Researchers, Inc.; 08_g5_ch11_youarethere.flp: Courtesy of Stanford Linear Accelerator Center; 08_g5_ch12_howtoread.flp: 373 (CR) Getty Images, (Bkgd) ©Jonathan Blair/Corbis; 08_g5_ch12_lesson2.flp: 378 ©DK Images; 379 (BR) Dave King/©DK Images, (TL) Andy Crawford and Tim Ridley/©DK Images, (TR, TC) ©Richard Megna/Fundamental Photographs; 08_g5_ch12_mathinscience.flp: 396 (Bkgd) Digital Vision, (CR, BL) ©Scott Camazine/Photo Researchers, Inc.; 397 ©Scott Camazine/Photo Researchers, Inc.; 08_g5_ch12_youarethere.flp: ©Jonathan Blair/Corbis; 08_g5_ch13_howtoread.flp: 405 (CR) ©Royalty-Free/Corbis, (Bkgd) ©Tim Bird/Corbis; 08_g5_ch13_mathinscience.flp: 434 NASA; 08_g5_ch13_youarethere.flp: ©Tim Bird/Corbis; 08_g5_ch14_howtoread.flp: 445 Brand X Pictures; 08_g5_ch14_lesson1.flp: 453 (BR) Tracy Morgan/©DK Images, (TC, TCR, CR) Brand X Pictures, (CL) ©DK Images, (CCL) ©Barry Runk/Grant Heilman Photography, (CC) Dave King/©DK Images, (C) Getty Images, (BC) Hemera Technologies, (BC) ©Peter Frischmuth/Peter Arnold, Inc.; 08_g5_ch14_mathinscience.flp: 468 (Bkgd) ©The Image Bank/Getty Images, (CR) ©Stone/Getty Images; 469 (Bkgd) ©The Image Bank/ Getty Images, (TR) ©Reuters/Corbis; 08_g5_ch14_youarethere.flp: Brand X Pictures, Getty Images; 08_g5_ch15_howtoread.flp: 477 ©Bettmann/Corbis; 08_g5_ch15_mathinscience.flp: 92 (Bkgd) Digital Vision, (BR) ©Comstock Images/Getty Images; 08_g5_ch15_youarethere.flp: ©Bettmann/Corbis; 08_g5_unitc_wrapup.flp: Courtesy of Stanford Linear Accelerator Center, ©Jonathan Blair/Corbis, ©Tim Bird/Corbis, Brand X Pictures, Getty Images, ©Bettmann/Corbis; 08_g5_ch16_howtoread.flp: 509 (Bkgd) ©Morton Beebe/Corbis, (CR) National Maritime Museum/ ©DK Images; 08_g5_ch16_mathinscience.flp: 532 ©Gregory MacNicol/Photo Researchers, Inc.; 533 ©Rafael Macia/Photo Researchers, Inc.; 08_g5_ch16_youarethere.flp: ©Morton Beebe/Corbis; 08_g5_ch17_howtoread.flp: NASA; 08_g5_ch17_mathinscience.flp: 564 (CR) Getty Images, (BR) ©Yann Arthus-Bertrand/Corbis, (Bkgd) ©JPL/NASA, (TL) Getty Images; 565 (TL) ©JPL/ NASA, (TR) Getty Images; 08_g5_ch17_youarethere.flp: NASA; 08_g5_ch18_howtoread.flp: 573 ©Reuters NewMedia, Inc./Corbis; 08_g5_ch18_mathinscience.flp: 594 (CR) ©Photodisc Green/Getty Images, (Bkgd) U.S. Geological Survey; 08_g5_ch18_youarethere.flp: ©Reuters NewMedia, Inc./Corbis; 08_g5_unitd_wrapup.flp: ©Morton Beebe/Corbis, NASA, ©Reuters NewMedia, Inc./Corbis.

Interactive Presentation Software Credits - Florida
fl_ch01_howtoread.flp: 5 (Bkgd) ©Jim Brandenburg/Minden Pictures, ©DK Images; fl_ch01_lesson3.flp: 1 (TC) ©Tony Wharton/Frank Lane Picture Agency/Corbis, (TL, TR) ©DK Images; fl_ch01_mathinscience.flp: 28 (Bkgd) ©Ralph A. Clevenger/Corbis, (TR) ©Michael Durham; 29 (TL) Colin Keates/Courtesy of the Natural History Museum, London/©DK Images, (TC) ©DK Images, (TR) ©Chassenet/Photo Researchers, Inc.; fl_ch01_youarethere.flp: (C) ©Jim Brandenburg/Minden Pictures, (BL) ©Michael Melford/NGS Image Collection; fl_ch02_howtoread.flp: 37 (Bkgd) ©Michael Webb/Visuals Unlimited, (CR) ©NCI/Photo Researchers, Inc.; fl_ch02_mathinscience.flp: 52 (Bkgd) ©Quest/Photo Researchers, Inc., (Bkgd) ©Dr. Fred Hossler/Visuals Unlimited; fl_ch02_youarethere.flp: ©Michael Webb/Visuals Unlimited; fl_ch03_howtoread.flp: 61 (Bkgd) ©Lester Lefkowitz/Corbis, ©Michael Webb/Visuals Unlimited; fl_ch03_mathinscience.flp: 82 (C) ©BodyOnline/Getty Images, (BL, BR, BCR) Getty Images; fl_ch03_youarethere.flp: ©Lester Lefkowitz/ Corbis; fl_ch04_howtoread.flp: 3 ©John Durham/Photo Researchers, Inc.; fl_ch04_mathinscience.flp: 116 ©Abrams/ Lacagnina/Getty Images; fl_ch04_youarethere.flp: ©John Durham/Photo Researchers, Inc.; fl_ch05_howtoread.flp: 125 (CR) ©DK Images, (Bkgd) ©Larry Michael/Nature Picture Library; fl_ch05_mathinscience.flp: 156 ©Chris Newbert/Minden Pictures; fl_ch05_youarethere.flp: (CL, CR) ©D. Robert & Lorri Franz/Corbis, (Bkgd) ©Larry Michael/Nature Picture Library; fl_ch06_howtoread.flp: 165 ©Michael & Patricia Fogden/Minden Pictures; fl_ch06_mathinscienc e.flp: 180 ©Andrew Parkinson/Nature Picture Library; fl_ch06_youarethere.flp: (T, BR) ©DK Images, ©Mitsuhiko Imamori/Minden Pictures; fl_unita_wrapup.flp: (C) ©Jim Brandenburg/Minden Pictures, (BL) ©Michael Melford/NGS Image Collection, ©Michael Webb/Visuals Unlimited, ©Lester Lefkowitz/ Corbis, (CL, CR) ©D. Robert & Lorri Franz/Corbis, (Bkgd) ©Larry Michael/Nature Picture Library, (T, BR) ©DK Images, ©Mitsuhiko Imamori/Minden Pictures; fl_ch07_howtoread.flp: 197 ©David Pu’u/Corbis; fl_ch07_lesson1.flp: 200 ©NASA/ Corbis; 201 (CL) ©NASA/Corbis, (TR) ©Nik Wheeler/Corbis; fl_ch07_mathinscience.flp: 218 ©Warren Marr/Panoramic Images; fl_ch07_youarethere.flp: ©David Pu’u/Corbis; fl_ch08_mathinscience.flp: 252 ©Paul & Lindamarie Ambrose/ Getty Images; fl_ch08_lesson4.flp: NO CREDIT; fl_ch08_youarethere.flp: ©Chris Noble/Getty Images; fl_ch09_mathinscience.flp: 292 ©Anthony Bannister; Gallo Images/Corbis; 293 (TL) ©Albert J. Copley/Visuals Unlimited, (CL) ©Ken Lucas/ Visuals Unlimited, (TC, CR) ©Mark Schneider/Visuals Unlimited, (CC) ©William Weber/Visuals Unlimited, (TR) ©Carolina Biological/ Visuals Unlimited; fl_ch09_youarethere.flp: ©Raymond Gehman/NGS Image Collection; fl_ch10_lesson1.flp: 305 ©Natalie Fobes/ Corbis; fl_ch10_lesson2.flp: 306 ©Grafton Marshall/Corbis; 307 (CR) ©Chinch Gryniewicz/ Corbis, (TR) ©Reuters/ Corbis; fl_ch10_mathinscience.flp: 324 ©Richard Hamilton Smith/Corbis; fl_ch10_youarethere.flp: ©Gerry Ellis/Minden Pictures; fl_unitb_wrapup.flp: ©David Pu’u/Corbis, ©Chris Noble/Getty Images, ©Raymond Gehman/NGS Image Collection, ©Gerry Ellis/Minden Pictures; fl_ch11_howtoread.flp: 341 (Bkgd) Courtesy of Stanford Linear Accelerator Center, (CR) ©Roger Tully/Getty Images; fl_ch11_mathinscience.flp: 364 ©David Taylor/Photo Researchers, Inc.; fl_ch11_youarethere.flp: Courtesy of Stanford Linear Accelerator Center; fl_ch12_howtoread.flp: 373 (CR) Getty Images, (Bkgd) ©Jonathan Blair/Corbis; fl_ch12_lesson2.flp: 378 ©DK Images; 379 (BR) Dave King/©DK Images, (TL) Andy Crawford and Tim Ridley/©DK Images, (TR, TC) ©Richard Megna/Fundamental Photographs; fl_ch12_mathinscience.flp: 396 (Bkgd) Digital Vision, (CR, BL) ©Scott Camazine/Photo Researchers, Inc.; 397 ©Scott Camazine/Photo Researchers, Inc.; fl_ch12_youarethere.flp: ©Jonathan Blair/Corbis; fl_ch13_howtoread.flp: 405 (CR) ©Royalty-Free/Corbis, (Bkgd) ©Tim Bird/Corbis; fl_ch13_mathinscience.flp: 434 NASA; fl_ch13_youarethere.flp: ©Tim Bird/Corbis; fl_ch14_howtoread.flp: 445 Brand X Pictures; fl_ch14_lesson1.flp: 453 (BR) Tracy Morgan/©DK Images, (TC, TCR, CR) Brand X Pictures, (CL) ©DK Images, (CCL) ©Barry Runk/Grant Heilman Photography, (CC) Dave King/©DK Images, (C) Getty Images, (BC) Hemera Technologies, (BC) ©Peter Frischmuth/Peter Arnold, Inc.; fl_ch14_mathinscience.flp: 468 (Bkgd) ©The Image Bank/Getty Images, (CR) ©Stone/Getty Images; 469 (Bkgd) ©The Image Bank/ Getty Images, (TR) ©Reuters/Corbis; fl_ch14_youarethere.flp: Brand X Pictures, Getty Images; fl_ch15_howtoread.flp: 477 ©Bettmann/Corbis; fl_ch15_mathinscience.flp: 92 (Bkgd) Digital Vision, (BR) ©Comstock Images/Getty Images; fl_ch15_youarethere.flp: ©Bettmann/Corbis; fl_unitc_wrapup.flp: Courtesy of Stanford Linear Accelerator Center, ©Jonathan Blair/Corbis, ©Tim Bird/Corbis, Brand X Pictures, Getty Images, ©Bettmann/Corbis; fl_ch16_howtoread.flp: 509 (Bkgd) ©Morton Beebe/Corbis, (CR) National Maritime Museum/ ©DK Images; fl_ch16_mathinscience.flp: 532 ©Gregory MacNicol/Photo Researchers, Inc.; 533 ©Rafael Macia/Photo Researchers, Inc.; fl_ch16_youarethere.flp: ©Morton Beebe/Corbis; fl_ch17_howtoread.flp: NASA; fl_ch17_mathinscience.flp: 564 (CR) Getty Images, (BR) ©Yann Arthus-Bertrand/Corbis, (Bkgd) ©JPL/NASA, (TL) Getty Images; 565 (TL) ©JPL/ NASA, (TR) Getty Images; fl_ch17_youarethere.flp: NASA; fl_ch18_howtoread.flp: 573 ©Reuters NewMedia, Inc./Corbis; fl_ch18_mathinscience.flp: 594 (CR) ©Photodisc Green/Getty Images, (Bkgd) U.S. Geological Survey; fl_ch18_youarethere.flp: ©Reuters NewMedia, Inc./Corbis; fl_unitd_wrapup.flp: ©Morton Beebe/Corbis, NASA, ©Reuters NewMedia, Inc./Corbis.

Grade 6

Active Glossary Credits
abiotic factor : ©Roger Leo/Index Stock Imagery, ©Jose Fuste Raga/eStock Photo; acid precipitation : ©Will & Deni McIntyre/Corbis; alveoli : Leonello Calvetti; antibody : Jeff Mangiat; autonomous robot : ©ARC/NASA; bacteria : ©SciMAT/Photo Researchers Inc., ©S. Lowry/Univ. Ulster/Getty Images, ©Institut Pasteur/Phototake; biome : Adam Benton; biosphere : ©Ron Thomas/Getty Images, ©Gerald L. Kooyman/Animals Animals/Earth Scenes, ©David Paynter/Age Fotostock; biotic factor :©DK Images, ©Michael Sewell/Peter Arnold, Inc., Neil Fletcher andMatthew Ward/©DK Images, Jane Burton/©DK Images, ©Daniel Cox/GettyImages, ©Tom Shaw/Tom Stack & Associates, Inc., Getty Images,Michael Quinton/Minden Pictures; carbon nanotube : Tony Randazzo; cellular respiration : Tony Randazzo; chemical change : ©DK Images; chemical property: ©Diane Schiumo/Fundamental Photographs; chemical weathering : ©Angelo Homak/Corbis, ©Historical Picture Archive/Corbis; chromosome : ©Andrew Syred/Photo Researchers, Inc.; classification :©DK Images, Jerry Young/©DK Images, Getty Images, George Grall/NGSImage Collection, Natural History Museum/©DK Images, Jane Burton/©DKImages; climate : Daniel J. Cox/Natural Exposures; coal : ©L. Lefkowitz/Getty Images, Peter Bollinger; community : Peter Johnson/Corbis; compare : ©DK Images; competition : ©Michael Sewell/Peter Arnold, Inc., ©Daniel Cox/Getty Images, ©John Shaw/Tom Stack & Associates, Inc.; constellation : ©Roger Ressmeyer/Corbis; continental drift : David Preiss; contrast: ©DK Images; core : Big Sesh Studios; crust : Big Sesh Studios; crystal : ©DK Images; decomposer : ©Jim Brandenburg/Minden Pictures; diffusion : Robert Ulrich; DNA : Robert Kayganich; ecosystem : ©Andrew Brown;Ecoscene/Corbis; effort force : ©DK Images; egg cell : David Preiss; electric motor : Tony Randazzo; electromagnetic waves :©Roger Ressmeyer/Corbis, ©Lester Lefkowitz/Corbis, ©David Parker/PhotoResearchers, Inc., ©Joel Sartore/NGS Image Collection, ©LeonardLessin/Photo Researchers, Inc., ©Corbis, ©DK Images, Sony/©DK Images; element : ©Larry Stepanowicz/Visuals Unlimited; endocrine gland : Jeff Mangiat; endoplasmic reticulum : Robert Ulrich; energy pyramid : Neli Flecher and Matthew Ward/©DK Images, ©Michael Quinton/Minden Pictures, Matthew Ward/©DK Images; environment : Melissa Farlow/Aurora & Quanta Productions, ©DK Images, ©Kurt Stier/Corbis; enzymes : Leonello Calvetti; epidermis : ©Runk/Schoenberger/Grant Heilman Photography; fault : Alan Male; fertilization : David Preiss; fossil fuels : Tony Randazzo; front : ©DK Images; fungi : ©Jim Brandenburg/Minden Pictures; galaxy : KSC/NASA; gene : Robert Kayganich; generator : Tony Randazzo; geothermal energy : Tony Randazzo; gland : Jeff Mangiat; gravitational force : ©David Ducros/Photo Researchers, Inc.; guard cell : ©Dr. Jeremy Burgess/Photo Researchers, Inc.; heredity : ©American Images Inc./Getty Images; host : ©Frank Blackburn; Ecoscene/Corbis; humidity : ©DK Images; humus : Clive Streeter/©DK Images; igneous rock : Alan Male; impulse : Jeff Mangiat; industrial robot : AP/Wide World Photos; inertia : ©DK Images; light-year : ©Edinburgh Royal Observatory/Photo Researchers, Inc.; lithosphere : David Preiss; machine : Getty Images; magnetic domain : ©DK Images; magnitude : ©Roger Ressmeyer/Corbis; mantle : Big Sesh Studios; meiosis : Robert Fenn; metamorphic rock : ©DK Images, Mike Dunning/©DK Images; mineral : ©DK Images, Natural History Museum/©DK Images, Colin Keates/Courtesy of Natural History Museum/©DK Images; mitochondria : Robert Ulrich; mitosis: Robert Ulrich; nanotechnology : ©ARC/NASA; natural gas : ©Royalty-Free/Corbis; neuron : ©CNRI/Photo Researchers, Inc.; nonrenewable resource : ©Charles E. Rotkin/Corbis; nonvascular plant : ©DK Images; organelle : Robert Ulrich; organic matter : Tony Randazzo; osmosis : Robert Ulrich; parasite : ©Frank Blackburn; Ecoscene/Corbis; pathogen : Jeff Mangiat; petroleum : ©Tom & Pat Leeson/Photo Researchers, Inc.; phloem : Grunk/Schoenberger/Grant Heilman Photography, Inc.; photosynthesis : Jeff Mangiat; plate boundary : Corbis, Adam Benton, ©Tom Bean/Corbis, ©Yann Arthus-Bertrand/Corbis; plate tectonics : David Preiss; population : ©Neil McIntyre/Getty Images; predict : ©Roy Rainford/Robert Harding Picture Library, Ltd.; radiation : Robert Kayganich; renewable resource : ©Arthur Rothstein/Corbis; ribosome : ; robot : ©John Madere/Corbis; robotics : ©John Madere/Corbis; rock: ©J. Eastcott Film/NGS Image Collection; sediment : Alan Male; sedimentary rock : ©DK Images, Colin Keates/Courtesy of the Natural History Museum/©DK Images; sequence : ©Charles Melton/Visuals Unlimited, ©Brad Morgan/Visuals Unlimited, ©Dick Scott/Visuals Unlimited, ©DK Images; sexual reproduction : ©Frans Lanting/Minden Pictures; solar system : ©NASA/Photo Researchers, Inc.; species : Jerry Young/©DK Images; sperm cell : David Preiss; star : ©Roger Ressmeyer/Corbis; stoma : ©Dr. Jeremy Burgess/Photo Researchers, Inc.; succession : Peter Bollinger; symbiosis: ©Stephen Frink/Corbis; transpiration : ©Dr. Jeremy Burgess/Photo Researchers, Inc.; vascular plants : ©DK Images, ©Runk/Schoenberger/Grant Heilman Photography; weather : ©Nigel J. Dennis/Gallo Images/Corbis, ©Marc Muench/Corbis, ©Taxi/Getty Images, ©Bruce Peebles/Corbis; weathering : Natural History Museum/©DK Images, ©Jeremy Horner/Corbis; xylem : Grunk/Schoenberger/Grant Heilman Photography, Inc.

Science Games
Question 1 ©The Image Bank/Getty Images, ©DK Images,Geoff Moon/Frank Lane Picture Agency/Corbis, ©Ric Ergenbright/Corbis,Getty Images, ©Michael & Patricia Fogden/Corbis, ©John Lund/Corbis,©G. Renner/Robert Harding Picture Library Ltd., ©Robb DeWall, ©SteveMaslowski/Photo Researchers, Inc., Jerry Young/©DK Images, GettyImages, Brand X Pictures, ©Tony Freeman/PhotoEdit, ©David Parker/PhotoResearchers, Inc., ©Kaz Mori/Getty Images, ©Dan Chung/Reuters/Landov,LLC, ©Ron Thomas/Getty Images, ©Gerald L. Kooyman/Animals Animals/EarthScenes, The Granger Collection, NY, (TR) ©Bruce Burkhardt/Corbis Question 2 ©Taxi/Getty Images, ©Royalty-Free/Corbis, Getty Images, ©William J.Weber/Visuals Unlimited, ©Ted Levin/Animals Animals/Earth Scenes,©Garry Black/Masterfile Corporation, Daniel J. Cox/NaturalExposures.com, ©David Ulmer/Stock Boston, ©Claus Meyer/Minden Pictures,©Yva Momatiuk/John Eastcott/Minden Pictures, ©Paul Almasy/Corbis, ©AlanSchein Photography/Corbis, ©Royalty-Free/Corbis, ©David Paynter/AgeFotostock Question 3 ©J. & B.Photographers/Animals Animals/Earth Scenes, S. PurdyMatthews/Stone/Getty Images, Alan G. Nelson/Animals Animals/EarthScenes, ©Taxi/Getty Images, ©Brand X Pictures/Getty Images, ©The ImageBank/Getty Images, Flip Nicklin/Minden Pictures, ©Carol Havens/Corbis,©Leonard Lessin/Peter Arnold, Inc., ©DK Images, Stephen Frink/Corbis,©Paulo De Oliviera/Animals Animals/Earth Scenes, ©DK Images,©Fotopic/Index Stock Imagery, ©Jose Fuste Raga/eStock Photo,©Duomo/Corbis, Getty Images, Bob Langrish/©DK Images, ©KevinAitken/Peter Arnold, Inc., ©Chris Newbert/Minden Pictures Question 4 ©Tom Brakefield/Corbis, ©Mark L. Stephenson/Corbis, Courtesy of theLondon Toy and Model Museum, Paddington, London/©DK Images, DK Images,Pete Atkinson/NHPA Limited, ©James Watt/Animals Animals/Earth Scenes,Kent Wood/Photo Researchers, Inc., ©Joe McDonald/Corbis, ©RodPlanck/Photo Researchers, Inc., ©Royalty-Free/Corbis, ©RogerRessmeyer/Corbis, ©/Corbis, ©Tom Bean/Corbis, ©YannArthus-Bertrand/Corbis, Getty Images, ©Roger Leo/Index Stock Imagery,Jerry Young/©DK Images, Daniel J. Cox/Daniel J. Cox/Natural Exposures,©Frans Lanting/Minden Pictures, ©Manfred Danegger/Photo Researchers,Inc., ©Zigmund Leszczynski/Animals Animals/Earth Scenes, ©Michael andPatricia Fogden/Corbis, Alan G. Nelson/Animals Animals/Earth Scenes,©Sumio Harada/Minden Pictures, ©John Stern/Animals Animals/Earth ScenesQuestion 5 ©The Image Bank/Getty Images, ©HollyHarris/Getty Images, ©Taxi/Getty Images, ©Richard Megna/FundamentalPhotographs, Dave King/Pitt Rivers Museum/University of Oxford,Oxford/©DK Images, ©DK Images, ©Gary W. Carter/Corbis, ©RolfKopfle/Bruce Coleman Inc., ©DK Images, ©Tom Uhlman/Visuals Unlimited,©DK Images, ©Arnulf Husmo/Getty Images5 ©Joseph Sohm/ChromoSohmInc./Corbis, ©GSFC/NASA Image Exchange, ©JPL/NASA, ©ArielSkelley/Corbis Question 6 ©Julie Eggers/BruceColeman Inc., ©Steve Solum/Bruce Coleman Inc., ©Comstock Inc.,©Stone/Getty Images, ©Doug Scott/Age Fotostock, ©DK Images, ©Andrew J.Martinez/Photo Researchers, Inc., ©Ralph White/Corbis, ©DK Images, AndyCrawford/©DK Images, Getty Images, ©John Sanford/Photo Researchers,Inc., Adam Benton, ©NOAO/Gatley Merrill/Ressmeyer/Corbis Question 7 Corbis, ©Comstock Inc., Getty Images, ©/Corbis, ©MacduffEverton/Corbis, ©E. Braverman/Getty Images, ©Raymond Gehman/NGS ImageCollection, ©Cornelia Doerr/Age Fotostock, G. Li Causi/A.Ricciardi/A.Garatti/Alessandro Vannini, Rome , Italy Question 8 ©Boden/Ledingham/Masterfile Corporation, ©Lester Lefkowitz/Corbis, ©Andrew Brown; Ecoscene/Corbis, ©Tom Bean/DRK Photo Question 9 ©Tom Uhlman/Visuals Unlimited, Digital Vision, ©Indianapolis Star,Frank Espich/AP/Wide World Photos, ©Hulton-Deutsch Collection/Corbis,DK Images, ©Joseph Van Os/Getty Images, ©Roger Ressmeyer/Corbis Question 10 ©Terry Renna/AP/Wide World Photos, ©David Vaughan/Photo Researchers,Inc., Photo Library, ©DK Images, Royal Museum of Scotland /©DK Images,©Roger Wilmshurst; Frank Lane Picture Agency/Corbis, (C) Getty Images,©Doug Sokell/Visuals Unlimited, ©NOAO/Gatley Merrill/Ressmeyer/Corbis

Interactive Presentation Software Credits
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Eagle Jr./Photo Researchers, Inc., (CL) ©Eye of Science/Photo Researchers, Inc., (B) ©Biophoto Associates/Photo Researchers, Inc.; 08_g6_ch07_mathinscience.flp: 194 (Bkgd) ©Stone/Getty Images, (CL) Corbis; 195 ©Theo Allofs/Corbis; 08_g6_ch07_youarethere.flp: ©Frans Lemmens/Getty Images; 08_g6_unita_wrapup.flp: ©1992 John Cancalosi/DRK Photo, ©Janet Foster/Masterfile Corporation, ©Gavriel Jecan/Getty Images, ©Jay Dickman/Corbis, ©Dan Suzio/ Photo Researchers, Inc., ©Ron Thomas/Getty Images, ©Frans Lemmens/Getty Images; 08_g6_ch08_howtoread.flp: 213 ©Mitsuaki Iwago/Minden Pictures; 08_g6_ch08_lesson3.flp: 224 PhotoLibrary; 08_g6_ch08_youarethere.flp: ©Mitsuaki Iwago/Minden Pictures; 08_g6_ch09_howtoread.flp: 245 (CR) ©Stuart Westmorland/Getty Images, (Bkgd) ©Albert Normandin/Masterfile Corporation; 08_g6_ch09_lesson1.flp: 250 ©Ron Watts/Corbis; 251 (TR) ©John Gerlach/Animals Animals/Earth Scenes, (CR) ©Fritz Polking/Peter Arnold, Inc.; 08_g6_ch09_youarethere.flp: ©Albert Normandin/Masterfile Corporation; 08_g6_ch10_howtoread.flp: 269 (CR) ©Brian Syynyk/Masterfile Corporation, (Bkgd) ©Alec Pytlowany/Masterfile Corporation; 08_g6_ch10_youarethere.flp: ©Alec Pytlowany/Masterfile Corporation; 08_g6_ch11_howtoread.flp: 293 (Bkgd) ©Sherman Hines/Masterfile Corporation, (CR) Corbis; 08_g6_ch11_mathinscience.flp: 316 ©Royalty-Free/Corbis; 08_g6_ch11_youarethere.flp: (Bkgd) ©Sherman Hines/Masterfile Corporation, (Bkgd) ©Dale Wilson/Masterfile Corporation; 08_g6_ch12_howtoread.flp: 325 (Bkgd) ©J. A. Kraulis/Masterfile Corporation, (CR) ©AnnieGriffiths Belt/Corbis; 08_g6_ch12_mathinscience.flp: 346 (Bkgd) ©Taxi/Getty Images, (C) ©Royalty-Free/Corbis, (TR) Getty Images; 347 ©Stuart Westmorland/Corbis; 08_g6_ch12_youarethere.flp: ©J. A. Kraulis/Masterfile Corporation; 08_g6_unitb_wrapup.flp: ©Mitsuaki Iwago/Minden Pictures, ©Albert Normandin/Masterfile Corporation, ©Alec Pytlowany/Masterfile Corporation, (Bkgd) ©Sherman Hines/Masterfile Corporation, (Bkgd) ©Dale Wilson/Masterfile Corporation, ©J. A. 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