Plate Tectonics

2. The sinking of regions of the of the Earth's crust to lower elevations
8. The process my which new oceanic lithosphere forms as magma, and rises toward the surface and solidifies
9. Stress that occurs when forces act to squeeze an object
10. The layer of rock between the Earth's crust and core
12. Global Positioning System
13. The thin and solid outermost layer of he Earth above the mantle
14. A break in a body of rock along which one block slides relative to another
15. When rocks are pushed together by compression
16. The soft layer of the mantle on which the tectonic plates move
17. The bending of rock layers due to stress
18. The rising of regions of the Earth's crust to higher elevations

1. A thinner and denser crust than continental crust
3. The strong, lower part of the mantle between the asthenosphere and the outer core
4. The solid, outer layer of the Earth that consists of the crust and the rigid upper part of the mantle
5. Stress that occurs when forces act to stretch an object
6. A block of lithosphere that consists of the crust and the rigid, outermost part of the mantle
7. When rocks are pulled apart because of tension
9. The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations
11. A thicker and less dense crust than oceanic crust
13. The central part of the Earth below the mantle