Chapters 1-3

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Across
  1. 2. Mountains Mountains that run across the west coast of South America
  2. 4. Cracks in the Earth in little pieces
  3. 7. stripes Evidence that the crust comes from the same place and same rate.
  4. 8. What continent looks like it can connect to South America
  5. 10. When the two plates move apart
  6. 11. When the two plates move toward each other
  7. 13. When the two plates move past each other
  8. 15. A process which the ocean floor sinks beneath a deep-ocean trench then back into the mantle
  9. 16. What continent has a crack in Earth's crust that you can walk over
  10. 18. Alfred Wegener used these to give evidence that there was a Pangaea
  11. 20. In mid-1900s, scientists mapped mid-ocean ridges with this device
Down
  1. 1. Where the ocean floor sinks back into and has convection currents
  2. 3. Supercontinent
  3. 5. Current Force that moves plates in mantle
  4. 6. The process of subduction and sea- floor spreading can change the shape and blank of the oceans
  5. 9. Drift Idea that the continents slowly moved over time
  6. 12. Sea-floor spreading adds more blank to the ocean floor
  7. 14. How many years have the plates been moving slowly
  8. 17. Wegener Scientist that thought all the continents were all together at once
  9. 19. Andreas Fault Famous fault that transform boundaries created