Across
- 3. non-living feature
- 5. when 2 animals live in the same area.
- 8. a symbiosis relationship
- 9. a type of water pollution.
- 10. something that breaks down another organism
Down
- 1. a hunter
- 2. type of water pollution
- 4. a living organism that indicates health.
- 6. the amount of hydrogen.
- 7. How clear the water is.
- 11. an animal that gets eaten
- 12. runoff from storm.