Science crossword puzzle

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