global systems crosswords

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Across
  1. 3. important natural cycle
  2. 7. a living thing other than a human being
  3. 8. it is reused
  4. 9. remains of a living thing
  5. 11. its an important part of the atmosphere
  6. 13. where plants grow and animals live
  7. 14. prevailing weather conditions
  8. 16. particular air
  9. 18. hot ball of fire
Down
  1. 1. humans survive by breathing it
  2. 2. humans live on it
  3. 4. an individual
  4. 5. water on the earths surface
  5. 6. a liquid substance
  6. 10. the four seasons
  7. 12. found in all living things
  8. 15. earths surface
  9. 17. they need water to grow