Continental Drift

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Across
  1. 8. Discovered seafloor spreading.
  2. 9. The process of the Earth's crust being recycled.
  3. 11. The person who came up with theory of continental drift.
  4. 12. The gradual movement of the continents across Earth's surface through time.
Down
  1. 1. Earthquakes have allowed us to define the ______________of plate tectonics.
  2. 2. Name of mountain range in the ocean.
  3. 3. The Earth's crust is broken up into these pieces.
  4. 4. What tectonic plates are floating on.
  5. 5. What a submarine uses to measure how far down the ocean floor is.
  6. 6. Remains of prehistoric organisms preserved in petrified form.
  7. 7. One big giant super continent.
  8. 10. The meaning of Pangea.