PLATE TECTONICS

2. a break in a body of rock along which one block slides relative to another
5. the bending of rock layers due to stress
7. the solid, dense center of the Earth
9. the layer of rock between the Earth's crust and core
11. when Earth's magnetic pole changes places
13. the solid outer layer of the Earth that consists of the crust and rigid upper part of the mantle
14. stress that occurs when forces act to squeeze an object
16. the sinking of regions of the Earth’s crust to lower elevations
18. when rocks are pulled apart because of tension
19. downward, trough-like folds of rock layers

1. the liquid layer of the Earth's core that lies beneath the mantle and surrounds the inner core
3. the strong lower part of the mantle between the asthenosphere and the outer core
4. upward-arching folds of rock layers
6. the central part of the Earth below the mantle
8. the theory that explains how large pieces of the Earth's outermost layer move and change shape
10. stress that occurs when forces act to stretch an object
12. when rocks are pushed together by compression
15. a process in which areas rise without deforming
17. the rising of regions of the Earth's crust to higher elevations
20. the thin and solid outermost layer of the Earth above the mantle