9 Ecology

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Across
  1. 2. What organisms need to grow, move, and survive.
  2. 5. The total weight of living things in an area.
  3. 6. Protecting plants, animals, and habitats.
  4. 7. A line of who eats whom in nature.
  5. 9. The process of breathing or getting energy from food.
  6. 14. The part of Earth where life exists.
  7. 15. Plants that make their own food using sunlight.
  8. 17. A close relationship between two different species.
  9. 21. A special feature that helps an animal or plant survive.
  10. 23. The place where an animal or plant lives.
  11. 24. A species that spreads and harms ecosystems.
  12. 25. Harmful things added to air, water, or land.
  13. 26. Using resources in a way that doesn’t harm the future.
  14. 29. When a species is gone forever.
  15. 30. A community of living and non-living things working together.
  16. 31. A network of connected food chains.
  17. 32. Animals that eat plants or other animals.
Down
  1. 1. A living thing like a plant, animal, or bacteria.
  2. 3. Different groups of species living together.
  3. 4. The number of different species in a habitat.
  4. 8. Non-living things in an environment, like rocks or water.
  5. 10. The role or job of an organism in its environment.
  6. 11. A group of the same type of animals in an area.
  7. 12. A relationship where one organism benefits and the other is harmed.
  8. 13. When organisms fight for the same resources.
  9. 16. Cutting down lots of trees in a forest.
  10. 18. A relationship where both species benefit.
  11. 19. The usual weather in an area over time.
  12. 20. A species at risk of disappearing.
  13. 22. Organisms that break down dead plants and animals.
  14. 27. Living things in an environment, like plants and animals.
  15. 28. The variety of plants and animals in an area.