Across
- 2. first people to record methods of treating water
- 4. third step in water treatment system
- 6. how many molecules of water are in a drop
- 10. step four in the water treatment system
- 11. water source under the ground
- 13. first step for water treatment system
- 15. liquid water becoming gas
Down
- 1. rain snow sleet and hail
- 3. water vapor becoming a liquid or solid
- 5. step seven for water treatment system
- 7. step eight for water treatment system
- 8. water as a gas in the air
- 9. water moving downward through openings in the soil
- 12. water under the ground that supplies spring and wells
- 14. first country to use chlorine to kill germs and water