Download Key Ideas and Vocabulary—Suggested Answers

Pg 538 UNIT Review Key Ideas and Vocabulary—Suggested Answers
1. A
7. A
2. C
8. B
3. D
9. C
4. B
10. B
5. B
11. D
6. B
12.
13. (a) I (b) I, II, and III (c) I (d) II (e) II (f) I (g) I
14. (a) III (b) I (c) IV (d) II
15. The Indian Plate is subducting beneath the Eurasian Plate. The crust on the Indian
Plate is crumpling up and being added to the crust of the Eurasian Plate.
Use What You’ve Learned—
Suggested Answers
17. A
18. D
19. C
20. If the Juan de Fuca Plate is diverging from the plate to its west and converging with
the plate to its east as shown by the tectonic mapping symbols, the plate must be
moving [generally] eastward.
21. D
22. No, the line of volcanoes north of Australia probably did not form over a hot spot.
The area has plate boundaries, and the volcanoes there are forming at subduction
zones.
23. The Puerto Rico Trench is probably deeper than the East Pacific Rise. Trenches
form at subducti and are the deepest parts of the ocean.
Think Critically—Suggested Answers
27.C
28. D
29. If tectonic activity has slowed or ceased in an area, the effects of weathering and
erosion will no longer be “balanced” by mountain-building processes, causing the
particular landform to become smaller.
30. A
31. Oceanic crust and continental crust have different compositions (are made up of
different kinds of rock).
32. Slab pull and ridge push are incredibly important in the movement of plates. Since
these mechanisms affect oceanic plates more in general, oceanic plates move
faster.