Across
- 2. generate magma that erupts onto earth's surface
- 7. piece of lithosphere with unique geologic history.
- 10. explains how plates move and change shape
- 12. study of alignment of magnetic minerals in rocks
- 14. cycle where continents form and break apart.
- 15. solid, plastic layer of the mantle.
- 16. undersea mountain chain with steep sides & narrow valley
- 17. process when earth's crust breaks apart.
Down
- 1. single landmass broke up and formed continents
- 3. boundary where 2 tectonic plate are moving away from earth other
- 4. boundary where 2 tectonic plates are sliding past each other
- 5. single large ocean that covered earth
- 6. supercontinent that formed 300 mil years ago.
- 8. sudden movement of the earth
- 9. boundary where 2 tectonic plates are colliding (coming together)
- 11. new seafloor is created when magma reaches earth's surface
- 13. solid, outer layer of the earth - crust & upper mantle