Plate Tectonics Plates, Plate Boundaries, and Driving Forces

by Anne Egger, Ph.D.

1. Most earthquakes are located

2. Which of the three main boundary types is least common?

3. Earthquakes along divergent boundaries occur only at shallow depths of 0 to 33 km below the earth's surface.

4. Why are we able to measure past plate motion using hotspots?

5. The driving forces behind plate tectonics, a subject that plagued Wegener, continue to be a matter of debate today. Which of the following is NOT a possible cause of plate motion?

6. The Himalayas occur along a convergent boundary where

7. When oceanic crust meets oceanic crust along a convergent boundary, which plate is most likely to be subducted?

8. The San Andreas Fault in California is an example of what kind of boundary?

9. Why did the distribution of earthquakes and volcanoes help confirm plate tectonic theory?

10. Continental crust is _______________________ than oceanic crust.

Geologists have a new game of chess to play, using a spherical board and strange new rules.
-Patrick M. Hurley, 1968

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