PLATE TECTONICS

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Across
  1. 6. the floor of the crust and ceiling of the mantle
  2. 8. cartographer who first mapped the sea floor
  3. 10. force that drives plate movement
  4. 12. where pieces of Earth's crust diverge on land
  5. 14. mountains formed when India collided with China
  6. 17. boundary type in which 2 plates move apart
  7. 18. device using soundwaves to map the ocean floor
Down
  1. 1. tropical fern whose fossils are distributed throughout Earth
  2. 2. boundary type in which 2 plates move toward each other
  3. 3. German scientist who proposed Continental Drift theory
  4. 4. ancient reptile whose fossils are found throughout Earth
  5. 5. frozen continent that somehow has tropical fern fossils
  6. 7. an underwater canyon, such as the Mariana Trench
  7. 9. place where new sea floor is formed
  8. 11. supercontinent consisting of all 7 continents joined in one landmass
  9. 13. break in the Earth's crust where rocks have slipped past each other
  10. 15. when an older, denser plate sinks back into the mantle
  11. 16. boundary type in which 2 plates slide past each other