Across
- 2. A construction that stores large amounts of water.
- 5. Bigger pieces of dirt and soil stick together and settle to the bottom of this tank.
- 7. Freshwater can be obtained from here.
- 8. Source of water.
- 10. Where water is cleaned before being supplied to homes.
- 11. Filter beds are made up of sand and ________.
- 12. Chemical that is added to prevent tooth decay.
Down
- 1. In many parts of Africa, people get their water from here.
- 3. Water is stored in tall towers to create enough _______ to push water along pipes.
- 4. Gas that is added to kill germs.
- 6. The process of removing salt from seawater.
- 9. Used water.