Organisms and their environment

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Across
  1. 2. the place where an organism lives
  2. 3. A community of organisms interacting with each other and their environment
  3. 5. An animal that feeds on other animals
  4. 7. Obtaining nitrogen from green plants in the form of nitrates and ammonium from the soil
  5. 9. An organism that is unable to make its own food
  6. 11. The process of nitrogen converting to ammonium compounds
  7. 14. An organism that get their energy by breaking down dead organisms
  8. 17. Animals that feed on both plants and animals
  9. 18. Made up of populations of different species living together
  10. 19. The position of an organism in a food chain, food web or ecological pyramid
  11. 21. Allows us to compare the mass of organisms in every trophic level
  12. 22. Population growth slowly increasing
  13. 25. Animals that feed on plants
  14. 26. Death and birth rates and population size staying constant
  15. 27. Population size dropping as the death rate is higher than the birth rate
  16. 29. The process of ammonium compounds converting to nitrates
  17. 31. Allows us to compare the total energy in every trophic level
Down
  1. 1. Animals that feed on other animals
  2. 4. Made up by the processes of carbon removed and released into the environment
  3. 6. web A network of connected food chains
  4. 8. Plants absorbing carbon dioxide and water to convert into oxygen and glucose
  5. 10. Different populations of plants and animals living together and interacting in the same environment
  6. 12. An organism that is able to make its own food
  7. 13. chain A series of organisms where energy is transferred from producer to consumer
  8. 15. Population size rapidly increasing due to maximum growth rate
  9. 16. relative sizes of different populations remaining constant
  10. 20. A group of organisms of the same species living together
  11. 23. An animal that is eaten by another animal
  12. 24. Allows us to compare the number of organisms present in every trophic level
  13. 27. Bacteria breaking down nitrates in the soil to nitrogen gas
  14. 28. The study of organisms interacting with each other and their surroundings
  15. 30. Animals releasing carbon dioxide into the atmosphere