Across
- 4. substances that can be decomposed by bacteria
- 6. a level of feeding in a food chain or food web
- 8. the study of how organisms interact with each other and the environment
- 9. releasing harmful substances into the environment
- 11. forming fossil fuels from dead organisms
- 13. a group of organisms of different species occupying particular area
- 14. a method of sampling stationary organisms
Down
- 1. an organism that manufactures its own food
- 2. an organism that relies on other organisms for food
- 3. a group of organisms of the same species occupying a particular area
- 5. converting decayed organisms to ammonia
- 7. the place where an organism lives or is usually found
- 10. an increase in nitrates in rivers and ponds
- 12. the function or role an organism plays in its environment