Across
- 2. The ____ Cycle is the circulation of oxygen in various forms through nature
- 5. An individual animal, plant or single celled life form
- 8. The biotic community & all the abiotic factors
- 10. Conversion of ammonia into nitrates and nitrites.
- 11. In _____ fixation, bacteria break down dead organisms and produce nitrogen gas
- 12. An _____ pyramid shows the flow of energy in a food chain.
Down
- 1. Bacteria reduce nitrate and nitrite to gaseous forms of nitrogen
- 3. In Carbon ______, plants turn inorganic carbon into organic compounds.
- 4. All members of the same species living together in an ecosystem
- 6. cycle- The ___ cycle is the movement of nitrogen
- 7. Group of 2 or more populations that interact
- 9. The movement of carbon and oxygen is the ____ Cycle
- 11. An organism’s role in its environment