Ecosystems

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Across
  1. 1. A process used by plants to make food.
  2. 5. The scientific study of how living things interact with each other and their environment.
  3. 8. A group of the same species living in one area.
  4. 11. The place where a particular organism lives.
  5. 14. The process where fungi and bacteria break down dead organisms.
  6. 15. Scientists describe ecosystems as this because they are constantly changing.
  7. 18. A relationship where organisms rely on one another.
  8. 19. Animals compete for this essential resource.
  9. 20. The variety of living organisms in an ecosystem.
  10. 21. A period with very little rainfall.
  11. 23. The movement of nutrients through an ecosystem.
Down
  1. 2. A factor that plants need to make food.
  2. 3. Organisms that make their own food using sunlight
  3. 4. The relationship where one organism hunts another.
  4. 5. A community of organisms interacting with the non-living environment.
  5. 6. Water, air and temperature are examples of these.
  6. 7. Plants absorb these from the soil.
  7. 9. A single living thing.
  8. 10. Organisms that eat plants.
  9. 12. The layer that provides nutrients for most plants.
  10. 13. All of the populations living together.
  11. 15. Organisms that break down dead animals.
  12. 16. Organisms that eat other animals.
  13. 17. The non-living parts of an ecosystem.
  14. 22. A natural event that can rapidly change an ecosystem.