Across
- 4. When heavier particles settle to the bottom of the water.
- 5. Adding chemicals to make particles stick together and form larger clumps.
- 8. Caring for and managing natural resources responsibly.
- 10. The process where small particles clump together into larger ones.
- 13. A measure of how acidic or basic the water is (scale 0–14).
- 14. Quality How clean or healthy the water is for living things.
- 15. A living organism used to test the health of a water system.
- 16. The process of cleaning water to make it safe to use.
- 17. All the water on Earth — in oceans, rivers, lakes, and the atmosphere.
Down
- 1. The process of removing particles from water by passing it through materials.
- 2. Killing harmful microorganisms, often with chlorine or UV light.
- 3. How clear or cloudy the water is; high turbidity means more particles.
- 6. Nutrients that can cause harmful algae blooms in excess.
- 7. Oxygen The amount of oxygen available in water for aquatic life.
- 9. Chemicals that can cause algae growth when too concentrated in water.
- 11. When harmful substances pollute water.
- 12. Water that is safe to drink.