Plate Tectonics

3. the layer of the earth made mostly of iron and contains small amounts of nickel
6. type of stress that occurs when an object is squeezed
10. tectonic plates fit together like pieces of this type of puzzle
11. theory that the Earth's lithosphere is divided in tectonic plates that move around
12. boundary between two plates moving horizontally past each other
14. pieces of the lithosphere that move around
17. made up of solid rock that flows very slowly
19. the rising of regions of the Earth's crust due to high elevations
20. process by which rock changes because of stress
22. boundary formed by two plates moving away from each other

1. stress when forces act to stretch an object
2. boundary formed by the collision of two plates
4. Greek for "all earth"
5. Spreading where the new ocean floor is formed by magam rising towards the surface and solidifies
6. the theory that suggests the continents at one point were all one big land mass
7. strong, lower part of the mantle
8. layer of the earth that conists of the crust and upper part of the mantle
9. the surface along where rocks break and slide past each other
13. Sinking of the Earth's crust in lower elevations
15. the outermost layer of the earth
16. the types of waves that are produced by an earthquake
18. the layer of the earth that contains most of the earth's mass
21. bending of rock layers due to stress