Grade 4 Crossword

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Across
  1. 2. an animal that eats both plants and animals
  2. 5. an organism that gets energy by feeding on dead materials
  3. 6. the environment an organism needs
  4. 11. a resource that nature can produce again in our lifetime
  5. 12. animal with a backbone
  6. 14. overlapping food chains that show where animals get their energy in an ecosystem
  7. 15. fuel derived from organic matter, such as agricultural waste
  8. 16. another name for a living thing
  9. 18. materials in the environment that are useful to people
Down
  1. 1. an animal that only eat other animals
  2. 3. fuels that are formed from the remains of ancient organisms
  3. 4. animal without a backbone
  4. 6. an animal that only eats plants
  5. 7. using natural resources wisely
  6. 8. a resource that cannot be reproduced in our lifetime
  7. 9. living and nonliving things interacting in an environment
  8. 10. an organism that makes its own food
  9. 13. characteristics that help organisms survive in their surroundings
  10. 17. harmful substances damaging the air, soil, or water
  11. 19. processing certain materials for reuse
  12. 20. an organism that must get energy from other organisms