Across
- 2. Relating to earthquakes or vibrations in Earth
- 6. A type of crust found under the oceans
- 9. A type of crust that forms the landmasses
- 12. A plate boundary where two plates move apart
- 13. A mountain that erupts with molten rock
- 15. The rigid outer layer of Earth consisting of the crust and upper mantle
- 16. A valley formed where tectonic plates pull apart
- 17. The layer of Earth between the crust and the core
- 19. The process where one tectonic plate moves under another
- 20. Molten rock beneath Earth's surface
Down
- 1. Large sections of Earth's lithosphere that move slowly
- 3. The innermost layer of Earth
- 4. A fracture in Earth's crust where movement occurs
- 5. A sudden shaking of the ground caused by tectonic plate movement
- 7. The movement of heated material that drives plate motion
- 8. The location where two tectonic plates meet
- 10. A plate boundary where two plates move toward each other
- 11. The outermost solid layer of Earth
- 14. A plate boundary where plates slide past each other horizontally
- 18. A large ocean wave caused by underwater earthquakes