Plate Tectonics

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Across
  1. 5. Devise that helped map the ocean floor
  2. 6. ___________ tectonics is the theory that the Earth's surface is cracked into large pieces.
  3. 8. When 2 plates collide and 1 plate sinks into the mantle, under the other plate.
  4. 9. When tectonic plates slip past each other.
  5. 10. Geological event that occurs when 2 plates move past each other ad releases energy.
  6. 12. The border between 2 plates
  7. 13. The movement of the tectonic plates, made by heat and pressure.
  8. 16. Name for when all the continents were once joined together millions of years ago.
  9. 17. Valley a low region that forms where plates move apart
Down
  1. 1. Last name of the man who first came up with the idea of plate tectonics.
  2. 2. The rigid outer part of the Earth (includes the crust and upper mantle)
  3. 3. When 2 continental plates collide they create ____________.
  4. 4. Where convection currents occur
  5. 7. When 2 tectonic plates move away from each other
  6. 11. What the plates are made out of
  7. 14. When tectonic plates move toward each other and collide.
  8. 15. Melted rock inside the Earth
  9. 18. A fracture or zone of fractures between 2 blocks of rock.