Science class crossword puzzle

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Across
  1. 2. Clean water with no salt
  2. 4. water from precipitation flows back into the ocean
  3. 6. process is how water goes up and around the earth
  4. 8. allowing liquids or gases to pass through it
  5. 9. water underground
  6. 10. water vapor coming from plants
Down
  1. 1. long sheets of ice
  2. 3. Water on the surface of the earth
  3. 5. water which collects as droplets on a cold surface when it's hot
  4. 7. when water is heated it _______.