Across
- 2. where an earthquake starts
- 6. a sensitive device that detects the shaking of a earthquake
- 7. shaking of earth's crust after the initial shaking
- 9. horizontal layers
- 10. the amount of energy released by an earthquake
- 12. a central opening in a volcanic area through which magma may escape
- 15. flows out of a vent
- 16. the continents which drifted in time
- 17. the layer beneath the earth
- 19. directly above the focus
- 22. heat from below earth's surface
- 23. a steep-sided cone that forms from explosive eruptions of hot rocks
Down
- 1. hot molten rock
- 3. a cone formed from explosive eruptions of hot rocks followed by a flow of lave, over and over
- 4. a vibration that spreads out away from a focus
- 5. a very hot part of the earth's mantle
- 8. the sliding of a denser ocean plate under another plate
- 11. the sea floor spreading apart
- 13. a cuplike hollow that forms at the top of a volcaano
- 14. the idea that earth's surface is broke into plates
- 18. a huge crack in the earth's crust
- 20. a wide, gently sloped cone that forms from flows of lava
- 21. rocky surface