Plate tectonics

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Across
  1. 3. forces which move the continents
  2. 6. molten rock in the Earth's mantle
  3. 8. when one plate is forced under another
  4. 9. molten rock that comes out of a volcano
Down
  1. 1. hard outer layer of the Earth
  2. 2. Vent in the top of the volcano
  3. 4. Plate moving into the S American plate
  4. 5. vibration felt when plates rub together
  5. 7. Hawaiian volcano
  6. 10. small fragments of rock thrown out by a volcano