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Date ________________________ Period ________________________ Name ________________________________________ Plate Tectonics SECTION 4 Causes of Plate Motions DETAILS MAIN IDEA Consider the title of Section 4. List three things that might be discussed in this section. 1. ______________________________________________________________ 2. ______________________________________________________________ 3. ______________________________________________________________ Review Vocabulary convection Use your text to define the following term. ________________________________________________________________ ________________________________________________________________ New Vocabulary ridge push Use your text to define each term. ________________________________________________________________ ________________________________________________________________ slab pull ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ Academic Vocabulary mechanism Define the following term. ________________________________________________________________ ________________________________________________________________ Plate Tectonics 197 Name ____________________________________ SECTION 4 Causes of Plate Motions (continued) MAIN IDEA DETAILS Mantle Identify two factors that cause convection. Describe the movement of a Convection convection current and sketch a current. Use with pages 486–487. ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ Use with pages 487–488. Compare the processes of ridge push and slab pull by filling in the table below. Type of plate boundary Description of movement Impact on plate tectonics Ridge push Slab pull Explain mantle convection currents by completing the following sentences. ________ currents in the _______ are thought to be the mechanism behind ________ __________. The mantle is like soft ________, so it can be moved like a fluid by convection currents. ________ energy inside Earth’s ________ starts the convection currents moving. Hot mantle material is ______ _______ than the cooler mantle material. Therefore, it ______ . Cooler parts of the mantle _______ toward the ________. Plate Tectonics 198 Name ____________________________________ SECTION 4 Causes of Plate Motions (continued) MAIN IDEA DETAILS Mantle Create a diagram to illustrate convection currents in the mantle. Use Convection Figure 21 to help you. Use with pages 486–488. • convection current • crust • asthenosphere • convergent plate • upper mantle boundary • trench Use with pages 486–488. • slab pull • divergent plate boundary • ridge push • lithosphere Identify unanswered questions that scientists still have about convection currents and plate tectonics. ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ANALOGY Draw a connection between heating soup on the stove and convection currents in the Earth. ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ Plate Tectonics 199 Name ____________________________________ Plate Tectonics Chapter Wrap-Up In the “What I Wanted to Find Out” column, copy the questions you listed in the Chapter Preview. In the “What I Learned” column, write down the answers you discovered as you worked through the chapter. W What I Wanted to Find Out 1. ________________________ ________________________ 2. ________________________ ________________________ 3. ________________________ ________________________ L What I Learned 1. ________________________ ________________________ 2. ________________________ ________________________ 3. ________________________ ________________________ Review Use this checklist to help you study. Study your Science Notebook for this chapter. Study the definitions of vocabulary words. Review daily homework assignments. Reread the chapter and review the tables, graphs, and illustrations. Answer the Section Review questions at the end of each section. Look over the Study Guide at the end of the chapter. SUMMARIZE After reading this chapter, list three things you have learned about plate tectonics. ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ Plate Tectonics 200
