plate tectonics

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Across
  1. 5. a depression in the ocean floor
  2. 6. the center of the earth
  3. 8. the crust that forms the continents
  4. 9. the crust that forms the ocean floor
  5. 10. the layer beneath earth's crust
  6. 11. the shaking wave-like movement of the ground in an earthquake
Down
  1. 1. the process of new crust forming at the oceans ridges and spreading outwards
  2. 2. a zone where earth's crust and mantle are being pulled apart
  3. 3. when one plate sinks below another plate during a collision
  4. 4. the process of new crust forming at the ocean ridges and spreading outwards
  5. 6. the separation of continents by drifting across earths surface
  6. 7. molten rock that has erupted onto the earth's surface
  7. 8. earth's outermost solid layer