Across
- 4. a substance used to clean muddy water
- 5. cause for lack of access to clean water
- 8. very tiny living things
- 9. process to kill the micro-organisms water
Down
- 1. process of settling down of heavier insoluble particles
- 2. process of pouring out upper clear layer of liquid
- 3. instrument used to observe small objects
- 6. disease linked to contaminated water
- 7. water that is safe for drinking