Download ES Chapter 9 Study Guide

ES Chapter 9 Study Guide
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1. What kinds of evidence supports Wegener’s hypothesis?
2. What does evidence about ancient climates indicate?
3. What evidence does the distribution of the swimming reptile Mesosaurus provide?
4. What is the main reason Wegener’s continental drift hypotheses was rejected?
5. In the plate tectonic theory, the lithosphere is divided into how many major plates?
6. How much do lithospheric plates move on average each year?
7. What is a plate made up of?
8. What is a geographic example of a transform fault boundary?
9. Where is new ocean crust formed?
10. What is an example of a divergent pate boundary on continental lithosphere?
11. What are deep ocean trenches associated with?
12. Referring to Figure 11 on p. 261, what type of plate boundary is illustrated?
13. Referring to Figure 11 on p. 261, what is the feature on the surface of the ocean
floor at the top of the subduction zone?
14. Referring to Figure 11 on p. 261, what layer of Earth is just above the subducting
oceanic lithosphere?
15. Referring to Figure 11 on p. 261, what process is illustrated by this diagram?
16. What happens to the leading edges of both plates at a subduction zone?
17. The Himalayas in South Asia are an example of what type of plate boundary?
18. Why are subduction zones not commonly found at convergent continentalcontinental boundaries?
19. According to what property do iron-rich rocks show the location of the magnetic
poles at the time of their formation?
20. What provides strong evidence for seafloor spreading?
21. Strips of alternating magnetic polarities found in rocks in the ocean basins provide
evidence of what?
22. How did the Hawaiian Islands form?
23. How does the age of seafloor sediments change with increasing distance from the
ocean ridge?
24. What type of boundary is the formation of the Hawaiian Islands associated with?
25. According to Figure 12 on p. 262, what mechanism of plate motion is illustrated?
26. According to Figure 12 on p. 262, what type of plate boundary is illustrated?
27. According to Figure 12 on p. 262, what is the feature at the top back middle of the
illustration?
28. What is the relationship between the foci of EQs at subduction zones and depth?