Across
- 4. where the earthquake starts
- 7. after the initial shake
- 8. a cone formed from explosive eruptions
- 11. the central opening
- 12. a device that detects the earth shaking
- 14. hot molten rock
- 18. supercontinent
- 20. broken plates
- 21. denser ocean plate
- 22. The layer beneath earths crust
Down
- 1. a vibration that spreads out
- 2. horizontal layers
- 3. heat from below earths surface
- 5. seafloor
- 6. a huge crack in the earth
- 9. when the magma comes out
- 10. the point directly above the focus
- 13. the amount of energy released
- 15. a very hot part of the mantle
- 16. a steep sided cone
- 17. a wide gently sloped volcano
- 18. rocky surface
- 19. a cuplike hollow that forms at the top of the volcano