Plate Tectonics

2. the relatively thin part of the earth's crust which underlines the ocean basins
4. the bending of rock layers
6. boundary between two colliding plates
7. theory that continents drift apart
11. the circulation of material caused by differences in temperature and density
14. capable of being molded or changing shape without breaking
16. boundary between two plates that are sliding past each other
17. as a slab sinks, it pulls on the rest of the plate with a force
18. layer between the crust and the core
20. a region where an oceanic plate sinks down into the athenosphere
21. the solid mineral material forming part of the surface of the earth and other similar planets, exposed on the surface or underlying the soil or oceans

1. piece of the lithosphere that moves on the asthenosphere
3. new lithosphere is created here
5. boundary between two plates moving away from each other
8. a pulling force
9. outer most, rigid layer of the Earth
10. rising mantle material at mid-ocean ridges creates the potential for plates to move away from the ridge with a force
12. outermost layer of the earth
13. a break in the Earth's crust
15. a squeezing force
19. layer of the mantle