Unit 10 Ecosystems

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Across
  1. 3. An animal that eats only other animals.
  2. 7. When two or more living things rely on each other to survive.
  3. 8. When organisms fight for the same resources, like food, water, or space.
  4. 14. Catching too many fish, which can harm fish populations and ecosystems.
  5. 15. When the number of organisms in a species increases or decreases.
  6. 20. Something that controls the size of a population, like food, water, or space.
  7. 23. An organism, like bacteria or fungi, that breaks down dead plants and animals.
  8. 24. Chemicals used to kill insects that can harm crops or spread disease.
  9. 27. A living thing that eats other organisms for energy.
  10. 28. A natural process where ecosystems change over time, with new plants and animals moving in.
  11. 30. When an ecosystem stays balanced over time.
  12. 31. The role an organism plays in its ecosystem, including what it eats and where it lives.
  13. 33. A living part of an environment, like plants, animals, and bacteria, that affects other living things.
  14. 34. When one living thing needs another to survive.
Down
  1. 1. When life slowly starts in an area with no soil, like after a volcanic eruption.
  2. 2. A plant or animal that naturally lives in a certain area.
  3. 4. A harmful effect on the environment or living things.
  4. 5. The process where pollen is moved from one flower to another to help plants make seeds.
  5. 6. Differences among living things in an area.
  6. 9. A living thing, like a plant, that makes its own food using sunlight.
  7. 10. A non-living part of an environment, like sunlight, water, or temperature, that affects living things.
  8. 11. When organisms become less affected by things like diseases or pesticides over time.
  9. 12. A chemical used to kill pests that harm plants or crops.
  10. 13. An animal that eats only plants.
  11. 16. A plant or animal that is not native to an area and harms the local ecosystem.
  12. 17. The variety of living things in an area, including different plants, animals, and microorganisms.
  13. 18. When an ecosystem recovers after a disturbance, like a fire or flood.
  14. 19. Using resources in a way that does not harm the environment or future generations.
  15. 21. A substance added to soil to help plants grow better.
  16. 22. The introduction of harmful substances into the air, water, or land.
  17. 25. A sudden change in an environment that affects living things.
  18. 26. A complex network of food chains that show how energy moves in an ecosystem.
  19. 29. A community of living things and their environment, working together.
  20. 32. A simple way to show how energy moves from one organism to another in an ecosystem.