Plate Tectonics

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Across
  1. 3. Continent
  2. 5. Spreading/Material continually being added
  3. 7. Plate
  4. 11. De Fuca/Smallest Plate
  5. 13. of boundary where plates rub against each other
  6. 18. Tectonics/Theory of plates in motion
  7. 19. Scientist
Down
  1. 1. of an ancient organism that has been preserved
  2. 2. that uses sound waves to measure distance
  3. 4. Drift/Wegener's Theory
  4. 5. Andreas Fault/Transform boundary in California
  5. 6. of the lithosphere
  6. 8. of boundary where plates push together
  7. 9. floor sinking into mantle
  8. 10. Trench/Underwater canyons
  9. 12. of boundary where plates pull apart
  10. 14. America/Africa and what other continent appear to fit together like puzzle pieces
  11. 15. Ridge/Long, underwater mountain chains
  12. 16. in the crust where plates slip past each other
  13. 17. of tectonic plates there are