Unit 1-11

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Across
  1. 3. made by nature not by people
  2. 7. the small hard parts from which new plants grow
  3. 8. free from danger
  4. 10. a machine that is driven by a flow of gas or water
  5. 11. to become different
  6. 12. a gas in the air that we need to stay alive
Down
  1. 1. to use or have something with others
  2. 2. tiny drops of water in the air or on a surface
  3. 4. to eat a little bit of food to see what it is like
  4. 5. warmth
  5. 6. to use things again often by turning garbage into new products
  6. 9. very thin metal thread