Water crossword

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Across
  1. 4. underground bubble of water
  2. 5. first people to treat water
  3. 8. last part of water treatment
  4. 10. what happens to water at 100C
  5. 12. gaseous water
  6. 13. percent of water in blood
  7. 14. what percent of an apple is water
Down
  1. 1. water falling from clouds
  2. 2. first country to clean water with chlorine
  3. 3. another word for rain
  4. 6. how much hydrogen is in water
  5. 7. percent of water on earth is salty
  6. 9. first part of water treatment
  7. 11. how much oxygen is in water