Across
- 2. a part of the earth that contains life
- 3. – First nitrogen compound produced from decaying organic matter
- 9. – Strikes during storms and fixes nitrogen from the atmosphere
- 10. organisms at the end of every food chain
- 12. – Intermediate compound in the nitrogen cycle between ammonia and nitrate
- 13. – Plants that host nitrogen-fixing bacteria in root nodules
- 14. organisms that eat dead plants and animals
- 15. animals in a ecosystem
Down
- 1. different populations living together
- 4. green plants that change the energy of the sun into glucose through photosynthesis
- 5. – A nitrogen compound formed as ammonia is oxidized
- 6. – Microscopic organisms that play a role in the nitrogen cycle
- 7. the study of plants and animals in their environment
- 8. – Natural phenomenon that helps fix nitrogen in the soil
- 11. plants in an ecosystem
- 16. a job of particular organism preforms