7 Science: Ecosystems

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Across
  1. 2. An organism that is eaten by a predator.
  2. 4. The circulation of nitrogen between organisms and the environment.
  3. 5. The movement of carbon through living and non-living systems.
  4. 8. Excess nutrients in a water body, leading to algal blooms.
  5. 12. A relationship where one species benefits, and the other is not affected.
  6. 13. An organism that breaks down dead material.
  7. 14. A sequence showing how energy flows through organisms.
  8. 16. The struggle between organisms for resources.
  9. 17. An organism that makes its own food (e.g., plants).
  10. 18. The natural environment where an organism lives.
  11. 19. An organism that eats other organisms for energy.
  12. 20. A close relationship between two organisms.
Down
  1. 1. A step in the food chain representing energy flow.
  2. 3. A community of organisms interacting with their environment.
  3. 6. An organism that hunts and eats other organisms.
  4. 7. A type of symbiosis where both species benefit.
  5. 9. A relationship where one organism benefits and the other is harmed.
  6. 10. The removal of trees, leading to habitat destruction.
  7. 11. The variety of living organisms in an area.
  8. 15. A complex network of interconnected food chains.