Across
- 4. this paper is used to remove insoluble particles
- 9. Lake where drinking water is stored
- 10. Chemical added to water tank where settling occurs
- 11. these form when water condenses
- 13. Heat from causes water to do this
- 14. Passing of water though beds of sand
Down
- 1. Used to kill bacteria in water
- 2. passing water though a wire mesh
- 3. Disease caused by bacteria in untreated water
- 5. This heat resistant glass sounds like it has a face on it
- 6. The process where a mineral is added to water to prevent tooth decay
- 7. Plants lose water into the air
- 8. Breathing in and out
- 12. Clumping of particles caused by aluminium sulfate