Plate Tectonics

3. breaking apart of earth's surface
4. boundary where 2 tectonic plate are moving toward each other
6. single, large ocean that covered earth's surface
10. theory explaining how lithosphere moves and changes shape
11. supercontinent that formed 300 million years ago
12. study of alignment of magnetic minerals in rocks
13. single landmass that broke up to form continents
15. molten rock in earth's surface
17. solid plastic part of the mantle
18. movement of heated material due to differences in density (different temperatures)

1. boundary where 2 tectonic plates are moving away from earth other
2. process where oceanic seafloor forms when magma rises pushing older seafloor away
5. boundary where 2 plates are sliding past each other
7. undersea mountain chain with steep narrow valley
8. can form when magma erupts onto earth's surface
9. solid outer layer of earth made of crust and upper part of mantle
14. piece of lithosphere with unique geologic features
16. sudden movement of earth's surface