Across
- 1. The process to clean dirty water.
- 6. Water supply is managed by the ________________ in different towns.
- 7. Our bodies are made up of a lot of water, we need to stay ____________.
- 8. ___________________ is a water cleaning method that does not remove any germs from the water.
- 9. _____________________ separates a liquid from one container into another without disturbing the settled substances.
- 10. Purification _____________ can also be used to kill the germs in water.
Down
- 1. We can kill germs and _______________ in water by boiling the water for a few minutes.
- 2. Harmful substances that can be used to kill germs or other microorganisms in water.
- 3. We need clean water in our seas, lakes and rivers because these are very important _____________________.
- 4. When water contains substances or germs that make it unsafe to drink.
- 5. The most common chemical used to kill germs (also used in swimming pools).
