April Vocabulary

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Across
  1. 2. worthless or of no use
  2. 4. materials that harm the environment
  3. 6. prevent waste of resources like water
  4. 7. substances used to kill pests
  5. 9. power for light, heat and machines
  6. 11. energy sources like wind and sun
  7. 15. this has five layers
  8. 17. living matter. Food with no pesticides
Down
  1. 1. heat-trapping gas
  2. 3. energy source formed millions of years ago
  3. 5. trash left out in the open
  4. 8. to collect materials to be used again
  5. 10. relating to or involving the planet
  6. 11. we need these to support ourselves
  7. 12. the natural world as impacted by humans
  8. 13. made up of mostly nitrogen and oxygen
  9. 14. the planet we live on
  10. 16. how organisms relate to each other
  11. 18. general weather over a period of time