Across
- 2. 83% of water in it
- 7. first people to treat water
- 8. 73% of Earth is covered
- 9. gas form of water
- 11. water held underground
- 14. solid form of water
- 15. H20
Down
- 1. first country to use chlorine to kill bacteria
- 3. kills germ bacteria
- 4. rain,snow,hail,sleet
- 5. sold form of water
- 6. what the Earth would look like without water
- 10. carried away water and sediment
- 12. storage for water
- 13. precipitation