Plate Tectonics and Continental Drift

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Across
  1. 3. causes sea floor spreading
  2. 7. supercontinent
  3. 9. crust of the upper mantle
  4. 10. no one believed wegener
  5. 11. ocean floor
  6. 14. two plates slip past eachother
  7. 16. two plates moving apart
  8. 19. proposed the theory of continental drift
  9. 20. top layer
Down
  1. 1. wegeners theory
  2. 2. 1912
  3. 4. ocean floor moving
  4. 5. remains of animals
  5. 6. deepest place on earth
  6. 8. longest mountain range
  7. 12. one plate gets sucked under another
  8. 13. theory of the plates
  9. 15. two plates come together
  10. 17. discovered sea floor spreading
  11. 18. changed as north amerca drifted
  12. 21. 1940's