Ecosystem: Chapter 3 & 4 Vocabulary Words

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Across
  1. 2. the addition of harmful materials to the environment
  2. 5. two or more overlapping food chains
  3. 8. trash that prevents harm to ecosystems
  4. 10. matter that breaks down easily in the environment
  5. 11. the basic unit that makes up all living things
  6. 12. travel to natural habitats that avoids harming them and helps organisms that live there
  7. 14. an animal that feeds on the remains of dead animals
  8. 15. decayed material from the remains of once-living things used to enrich soil
  9. 16. a living thing that breaks down the remains of dead organisms
  10. 19. microorganisms that live in water and form the beginning of most ocean food chains
Down
  1. 1. shows the path of food energy in an ecosystem from plants to animals
  2. 2. a process where plants make their own food
  3. 3. process of breaking down materials into a different form that can be used again
  4. 4. an animal that eats only plants
  5. 6. microorganisms found in all living organisms and everywhere on Earth
  6. 7. a tiny living thing that can be seen only with a microscope
  7. 9. a waste that can pollute the environment even when it occurs in very small amounts
  8. 13. an animal that eats both plants and animals
  9. 16. break down into simpler materials
  10. 17. an animal that eats only other animals
  11. 18. a material that causes pollution