project puzzle

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Across
  1. 5. water
  2. 6. of boiling water
  3. 8. dry ice
  4. 9. ice
Down
  1. 1. temp lower then the freezing point of water
  2. 2. water vapor rises
  3. 3. water turn into ice with a low temp of o
  4. 4. ice to water
  5. 7. carbon