Review the definition of
compare and contrast on
p. 380. Students can complete
Practice Book 3.1, p. 148 on their own, or you can complete it as a class. Point out
that one or more sections of the Venn diagram are empty, so students must fill
them in with information.
Have students work in pairs to find a comparison or a contrast on
pp. 388–389.
(Contrast: The outer core is liquid, and the inner core is solid. Comparison: The
mantle and core are hot.)
For additional instruction of compare and contrast, see
DI•56.
Graphic sources are any graphics, such as charts, graphs, time lines, diagrams, and
maps, that organize and present information in a visual manner.
Direct students' attention to the illustrations of Krakatoa on
p. 398. Ask them to tell what
they show and how they help us understand the information in the selection.
(They
show the mountain before the eruption and after; they help us understand how powerful
and destructive a volcanic eruption can be.)
Have students work in pairs to create a simple graphic depicting and explaining a recent
natural disaster. (Responses will vary; check that students' graphics help understand
the disaster better.)