Across
- 3. Underground water
- 4. Unable for liquid to pass through
- 6. the passing of liquid through a surface
- 7. Liquid slowly passing through a filter
- 9. Acidity
- 10. How clear the water is
- 11. Land that separates the flow of water
- 15. Water that is safe for us to drink
- 17. amount of calcium and magnesium salts in water
- 18. Identifiable point of pollution
Down
- 1. Salt of phosphoric acid
- 2. The flow of water to a river
- 5. Unidentifiable point of pollution
- 7. Easy for liquid to pass through
- 8. Water is attracted to water
- 12. The tension of water on a surface area
- 13. Salt of nitric acid
- 14. Rapid growth of algae
- 16. Water is attracted to other objects
- 19. Taking care of something