1. Describe the differences between the eastern and western margins of North America in terms of earthquakes and volcanic activity and explain why this behavior is consistent with the plate tectonic environments of both areas. Include an explanation of the plate environment(s) in both cases.
2. One shortcoming of the "continental drift" model of moving continents is that it was expressed in terms of crust instead of in terms of lithosphere. What's the difference between crust and lithosphere and why is that important to the plausibility of "plate tectonics" as opposed to "continental drift"?
3. Using the Wilson cycle, very briefly (a sentence or two) explain the formation of mountain ranges such as the Appalachians and the Urals. In what ways do mountains like these provide evidence for reconstructing the ancient history of plate motions?
4. The boundary between the Pacific Plate and the North American Plate has examples of all three kinds of motions: convergent, divergent, and transform.
Ture or False?
5. The Himalayas are an example of a volcanic chain forming at a convergent boundary.
Ture or False
6. The presence of a divergent boundary (mid-ocean ridge) running through an oceanic basin indicates that the basin must be getting wider in order to accommodate the new material forming in the middle.
True or false
7. The amount of continental crust on Earth's surface has been steadily increasing for approximately the last four billion years (4 Ga).
True or False
8. The amount of oceanic crust on Earth's surface has been steadily increasing for approximately the last four billion years (4 Ga).
True or False