Kylie Bollenbacher

1. A very hot part of the earth's mantle, where magma can melt through a plate moving above it.
4. Magma that reaches earth's surface and flows out a vent.
6. A wide, gently sloped cone that forms from flows of lava.
9. Hot molten rock below earth's surface.
10. A huge crack in earth's crust at or below the surface, the sides of which may show evidence of motions.
13. earth's solid rocky surface containing the continents and ocean floor.
14. The idea that earth's surface is broken into plates that slide slowly across the mantle.
17. A steep sided cone that forms from explosive eruptions of hot rocks, ranging from particles to boulders.
18. A cup like hollow that forms at the top of a volcano around the vent.
20. Heat from below earth's surface.
21. The idea that new crust is forming at ridges in the sea floor, spreading apart the crust on either side of the ridges.

2. The idea that many kinds of rocks form flat, horizontal layers.
3. A cone formed from explosive eruptions of hot rocks followed by a flow of lava, over and over.
5. The idea that a super continent split apart into pieces the continents which drifted in time to their present location.
7. The amount of energy released by an earthquake.
8. The sliding of a denser ocean plate under another plate when they collide.
10. The point where and earthquake starts as rocks begin to slide past each other.
11. A vibration that spreads out away from a focus when an earthquake happens.
12. The central opening in a volcanic area through which lava may escape.
15. The point on earth's surface directly above the focus of an earthquake.
16. The layer beneath earth's crust.
19. A sensitive device that detects the shaking of earth's crust during an earthquake.