Across
- 4. moving toward the same place
- 8. the place where two plates meet
- 9. the layer of soft, solid rock underneath Earth's plates
- 10. a long, deep indentation in the ocean floor formed when two plates move together
- 11. to examine in detail for a purpose
- 12. the outside or top layer of something
- 13. moving apart in different directions
Down
- 1. an underwater mountain range formed when two plates move apart
- 2. activity any of the many processes in which gas, lava, and ash are pushed out on the surface of Earth
- 3. something we observe to be similar over and over again
- 5. a sudden shaking of Earth's surface
- 6. how often or fast something happens
- 7. one of the very large sections of hard, solid rock that make up Earth's outer layer