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370   Directed Inquiry Explore What can happen during a chemical change? 372   How to Read Science Draw Conclusions 373     You Are There! 374      Lesson 1 What are chemical changes? 375      Lesson 2 What are some kinds of chemical reactions? 378      Lesson 3 How are chemical properties used? 382      Lesson 4 How is chemical technology used in our lives? 386   Guided Inquiry Investigate How does temperature affect how long a reaction takes? 394      Solving Equations About Mass 396     Chapter 12 Review and Test Prep 398       Materials Scientist 400