Volcanoes 101

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Across
  1. 1. rock
  2. 4. types
  3. 6. boiling
  4. 7. flatter
  5. 9. chains
  6. 10. gas
Down
  1. 2. core
  2. 3. world
  3. 4. tall
  4. 5. plates
  5. 6. burst
  6. 8. ocean