The rocky mountains

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Across
  1. 3. when an island splits off of a continent
  2. 8. main factor of an earthquake
  3. 10. the mountains are made of them
Down
  1. 1. one of the main predators of the Rocky mountains
  2. 2. when a mountain becomes a crater
  3. 4. a species of animal that kills other animals
  4. 5. bubbling hot helium are found in these
  5. 6. the rockies are 3000 _____ long
  6. 7. special rocks from a long time ago
  7. 9. scratch marks on certain rocks