Across
- 5. piece of lithosphere with unique geologic features
- 9. supercontinent that formed 300 million years ago
- 10. single landmass that broke up to form continents
- 11. boundary where 2 tectonic plates are moving away from earth other
- 12. theory explaining how lithosphere moves and changes shape
- 15. single, large ocean that covered earth's surface
- 16. boundary where 2 tectonic plate are moving toward each other
- 17. breaking apart of earth's surface
- 18. can form when magma erupts onto earth's surface
Down
- 1. solid outer layer of earth made of crust and upper part of mantle
- 2. study of alignment of magnetic minerals in rocks
- 3. movement of heated material due to differences in density (different temperatures)
- 4. process where oceanic seafloor forms when magma rises pushing older seafloor away
- 6. solid plastic part of the mantle
- 7. molten rock in earth's surface
- 8. undersea mountain chain with steep narrow valley
- 13. boundary where 2 plates are sliding past each other
- 14. sudden movement of earth's surface