Across
- 2. one of the types of evidence that Wegener used to prove the continents were together
- 6. movement in this cause earths magnetic current
- 8. Wegener's idea that the continents have moved
- 9. rocks farther from the mid ocean ridge are denser/ less dense
- 10. a supercontinent from around 300 million years ago
- 14. a "mountain range" that rock comes out of from the mantle
- 17. a boundary when two plates ram into each other
- 18. when ocean floor is pushed below continental crust
- 19. rocks closer to the mid ocean ridge are warmer/ cooler
- 21. the layer of mantle that the plates sit on
Down
- 1. all of Earth's plate motion put into one theory
- 3. breaks in Earth's crust
- 4. an tool that uses sound waves and time to map the ocean floor
- 5. what is used to prove something
- 7. rocks fall into the mantle and are then heated and part of the mantle
- 11. the scientist who founded the idea of continental drift
- 12. a boundary where two plates separate
- 13. the ocean continuously add new material to its floor
- 15. where Earth’s crust diverges on land
- 16. a boundary when two plates run along each other
- 20. a rock or animal that was preserved in rock