Science Vocabulary Puzzle

3. An extended break in a body of rock.
5. The sideways and downward movement of the edge of a plate into the mantle beneath another plate.
8. A sudden and violent shaking of the ground, a result of movements within the earth's crust or volcanic action.
10. The point on the earth's surface vertically above the focus of an earthquake.
13. The upper layer of the earth's mantle.
14. A fault along a plate boundary where the motion is predominantly horizontal.
19. A series of mountains or mountain ridges closely related in position and direction.
20. A boundary between two or more plates.

1. The relatively thick part of the earth's crust, it is older and more complex than the oceanic crust.
2. The rigid outer part of the earth, consisting of the crust and upper mantle.
4. An elastic wave in the earth produced by an earthquake.
6. A structure of the earth's crust, which moves slowly over the underlying mantle.
7. An area of volcanic activity.
9. A rigid layer of the earth's crust that is believed to drift slowly.
11. A tectonic boundary where two plates are moving toward each other.
12. The hypothetical landmass that existed when all continents were joined, about 300 to 200 million years ago.
15. A tectonic boundary where two plates are moving away from each other.
16. A mountain or hill with a pool of lava that explodes out of the top of the mountain or hill.
17. The relatively thin part of the earth's crust which underlies the ocean basins, it is geologically young compared to the continental crust.
18. A straight line or narrow section through or across the earth's surface.