Plate Tectonics

6. molten rock in earth's surface
7. piece of lithosphere with unique geologic features
8. can form when magma erupts onto earth's surface
12. single, large ocean that covered earth's surface
14. process where oceanic seafloor forms when magma rises pushing older seafloor away
15. solid outer layer of earth made of crust and upper part of mantle
16. boundary where 2 tectonic plates are moving away from earth other
18. undersea mountain chain with steep narrow valley

1. boundary where 2 plates are sliding past each other
2. sudden movement of earth's surface
3. breaking apart of earth's surface
4. boundary where 2 tectonic plate are moving toward each other
5. theory explaining how lithosphere moves and changes shape
9. single landmass that broke up to form continents
10. study of alignment of magnetic minerals in rocks
11. movement of heated material due to differences in density (different temperatures)
13. solid plastic part of the mantle
17. supercontinent that formed 300 million years ago