NFS Puzzle

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Across
  1. 2. materials found in nature
  2. 3. the parts of a fish that take in oxygen from the water
  3. 6. someone who uses math and science to solve problems
  4. 7. a place where an animal can be safe
  5. 9. the way you observe and learn - there are five kinds
  6. 10. materials made by people
  7. 11. things that are not alive
Down
  1. 1. all the living and nonliving things in a place
  2. 4. what objects are made of
  3. 5. a test that scientists do
  4. 8. things that are alive