Across
- 3. point where an earthquake starts
- 5. steep sided cone that forms from explosive eruptions
- 6. layer beneath earth's crust
- 11. supercontinent split apart into pieces
- 13. central opening in a volcanic area
- 14. heat from below earth's surface
- 15. sliding of a denser ocean plate under another plate when they collide
- 16. very hot part on earth's mantle
- 17. directly above the focus
- 19. cuplike hollow that forms the top of a volcano
- 20. cone formed from explosive eruptions of hot rocks
- 21. solid rocky surface
- 22. vibration that spreads away from a focus
Down
- 1. hot molten rock
- 2. sea floor spreading apart the crust
- 4. wide gently sloped cone that forms from flows of lava
- 7. amount of energy released by an earthquake
- 8. horizontal layers
- 9. device that detects the shaking of earth's crust
- 10. huge cracks in earth's crust
- 12. shaking after the initial shaking
- 18. earth's surface surface is broken into plates