Plate Tectonics

4. capable of being molded or changing shape without breaking
6. piece of the lithosphere that moves on the asthenosphere
7. outermost layer of the earth
9. boundary between two colliding plates
10. as a slab sinks, it pulls on the rest of the plate with a force
12. a pulling force
13. drift theory that continents drift apart
14. layer between the crust and the core
16. rising mantle material at mid-ocean ridges creates the potential for plates to move away from the ridge with a force
19. 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. outer most, rigid layer of the Earth
2. a region where an oceanic plate sinks down into the athenosphere
3. a break in the Earth's crust
5. boundary between two plates that are sliding past each other
7. the circulation of material caused by differences in temperature and density
8. the bending of rock layers
11. soft layer of the mantle
13. a squeezing force
15. the relatively thin part of the earth's crust which underlines the ocean basins
17. boundary between two plates moving away from each other
18. new lithosphere is created here