Plate Tectonics

8. Molten rock beneath or in the Earth's crust
9. Semi-molten layer of the upper mantle on which tectonic plates float
11. Rigid, outer part of Earth, consisting of the crust and upper mantle
12. When two plates come together
13. Solid layer of Earth's core, hottest part of planet
14. Theory by Alfred Wagener that proposed that the continents were once joined together (Pangea) and have since broken apart
16. When two plates move away from each other
17. Process where sinking plate is pulled into mantle by gravity
19. Mountain/hill that magma erupts from
20. The thinner, denser type of crust (mostly basalt)

1. A violent, destructive shake of the ground caused from movements from the Earth's crust
2. Area where a plate descends into the mantle beneath another plate
3. A line of volcanic islands that are formed as a tectonic plate moves over a magma plume
4. The thicker, less dense layer of the Earth's crust (mostly granite)
5. An elevated portion of the earth's crust
6. A large, rigid, irregular, moving piece of rock that makes up a part of the Earth's outer shell
7. Liquid layer of Earth's core, generates Earth's magnetic field
10. Where two continental plates meet and are forced upwards, creating fold mountains
15. A place in the mantle where unstable elements breakdown, forming magma plumes
18. Science that deals with Earth's physical structure and substance