Plate Tectonics

2. The process by which old crust re-melts into the mantle.
9. The law of cross cutting relationships says that __________ are younger than the layers they cut through.
10. Motion of the Earth's crust occurs here.
12. The mid-Atlantic _________.
13. Occurs when two continental plates coll.ide.
15. Layer of Earth made of melted rock.
18. This rock forms when igneous rock is subjected to high temperature and pressure.
23. Type of rock associated with the sea floor.
24. Area below the lithosphere.
25. This rock forms from the cementation of sand or organic particles.

1. This process occurring in the mantle drives plate tectonics.
3. Earth's crust is broken into _________.
4. New crust is created at this boundary.
5. This process breaks down big rocks into sediment.
6. Occurs when pressure in the Earth's crust brings magma to the surface.
7. The law of superposition tells us that ________ rocks are always underneath younger rocks.
8. Earth's crust is this state of matter.
11. A geologic feature that results from subduction.
14. These mountains were formed by the collision between the Indian and Eurasian plates.
16. Plates move ________ from each other at a divergent boundary.
17. The pacific plate is made of this type of crust.
19. These mountains were created when continental and oceanic crust converged.
20. The upper portion of the mantle is called the _______ mantle.
21. Earthquakes occur along __________ boundaries.
22. This rock forms from cooled magma.