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3. a sensitive device that detects the shaking of Earth's crust during a Earthquake
6. the amount of energy released by an Earthquake
8. a cone fromed from explosive eruptions of hot rocks follwed by a flow a lava, over and over
11. a steep sided cone that forms from explosive eruptions of hot rocks
13. hot molten rock below earths surface
15. rides in the sea floor spreading apart the crust
16. the central opening in a volcanic area through which magma may escape
17. a cuplike hollow that froms at the top of the volcano arounf the vent
19. volcano a wide, gently sloped cone that forms fron flowas of lava
21. waves a vibration that spreads out away
22. sliding of a denser ocean platen under another plate when they collide

1. A very hot part of Earth's mantle, where magma can melt through a plate moving above it
2. magma that reaches Earth's surface and flows out a vent
4. rocks form flat
5. the point where the Earthquake starts as rocks begin to slide past each other
7. super continent split apart into pieces
9. the layer beneath Earth's crust
10. solid rocky surface
12. a huge crack in Earth's crust at or below the surface
14. shaking of Earth's crust after the initial shaking of an Earthquake
18. tectonics broken into plates that slide across the mantle
20. the point on Earth's surface directly above Earth's surface