Across
- 3. a huge crack in the Earth's crust
- 4. the sliding of a denser ocean plate under another plate when they collide
- 7. a cup like hallow that forms at the top of a volcano around the vent
- 8. hot, molten rock. below the Earth's surface
- 9. a sensitive device that detects the shaking of Earth's crust during an earthquake
- 12. a very hot part of the Earth's mantle where magma can melt through a plate moving above it
- 15. heat from below the Earth's surface
- 17. a vibration that spreads out away from a focus when an earthquake happens
- 18. the central opening in a volcanic area through which magma may flow
- 19. Earth's solid, rocky surface containing the continents and ocean floor
- 20. the point in the earth where an earthquake actually starts
- 22. the boundary where plates are colliding
Down
- 1. the idea that a super continent split apart into pieces, the continents, which drifted in time to their present location
- 2. the idea that many kinds of rocks form flat, horizontal layers
- 5. the boundary where plates are moving apart from each other
- 6. magma that reaches the Earth's surface and flows out of a vent
- 10. the amount of energy released by an earthquake
- 11. the idea that the Earth's surface is broken into plates
- 13. giant ocean waves formed when an earthquake occurs under the ocean floor
- 14. the name for the large super continent
- 16. the point on Earth's surface directly above the focus
- 21. the boundary where plates are moving apart from each other