ENVS Unit 1.2 Geology

2. Magma that reaches Earth's surface
5. A supercontinent containing all of Earth's land that existed about 225 million years ago.
8. One plate going under another plate
9. plate a piece of the lithosphere that moves around on top of the asthenosphere
12. A rigid layer made up of the uppermost part of the mantle and the crust.
14. The central part of the earth below the mantle
16. The mostly solid, rocky part of the Earth; extends from the center of the core to the surface of the crust.
17. rock rock that has been changed by heat and pressure
19. boundary A plate boundary where two plates move past each other in opposite directions
20. boundary A plate boundary where two plates move toward each other.

1. Molten rock beneath the earth's surface
3. a crack in the earth's crust
4. rock rock that forms when melted rock cools and hardens
6. The layer of hot, solid material between Earth's crust and core.
7. drift the gradual movement of the continents across the earth's surface through geological time.
10. The soft layer of the mantle on which the tectonic plates move
11. The strong, lower part of the mantle between the asthenosphere and the outer core
13. boundary The boundary between two tectonic plates that are moving away from each other
15. rock The type of rock that is made of hardened sediment.
18. Earth's outermost layer.