Plate tectonics

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