Earth Day Crossword

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Across
  1. 3. The study of ecosystems
  2. 4. An area where waste is stored
  3. 5. Able to maintain itself
  4. 6. Protecting something in-order to prevent extinction
  5. 10. The sky, clouds and air
  6. 11. Food waste and plants that are broken down
  7. 15. To create something of higher value that the materials used
  8. 16. The energy from the sun
  9. 17. Able to be renewed
  10. 18. An area that an organism lives
  11. 19. Trash that is left in public places
Down
  1. 1. The area there an organism lives
  2. 2. An area with access waste can ______ nearby environments
  3. 3. Where CO2 is let into the air
  4. 7. An an animal that can no longer be found
  5. 8. Maintaining its original state
  6. 9. Processing materials to make a new product
  7. 12. The chemical formula of O3
  8. 13. A community of living organisms
  9. 14. Living matter