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