Plate techtonics

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Across
  1. 3. moving apart
  2. 5. tall hill
  3. 7. in the air
  4. 8. thinnest layer of the earth
  5. 9. limit
Down
  1. 1. source of lava
  2. 2. rubbing against or sliding past
  3. 4. colliding together
  4. 6. shaking of the Earth