Water Crossword

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Across
  1. 1. 97% of earths water is
  2. 3. When oxygen and hydrogen mixes together it creates this
  3. 5. water freezes at 32 degrees
  4. 6. Boiling water over a fire was a way to clean
  5. 7. These people were the first to record methods of treating water
  6. 8. this is water vapor becoming a liquid or solid
  7. 12. This is a type of fresh water
  8. 13. The two chemicals that makes water hard are calcium
Down
  1. 2. A water source under the ground
  2. 3. this is highly explosive
  3. 4. This is rain, snow, sleet, or hail
  4. 9. This is combustible
  5. 10. First country to use chlorine in water
  6. 11. This is 70% water
  7. 14. Water turns to this when it freezes