1. What causes Earth's tectonic plates to move?
2. What type of boundary occurs when two plates move toward each other?
3. What was Alfred Wegener's theory about continents called?
4. Where do most earthquakes and volcanoes occur?
5. What does the Moment Magnitude scale measure?
6. Which feature is found at a deep ocean trench?
7. What happens at a divergent plate boundary?
8. Where do volcanoes typically form?
9. Where do most volcanoes and earthquakes NOT occur?
10. When was the theory of plate tectonics widely accepted?