science

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Across
  1. 2. this is a clear liquid that we drink
  2. 3. is a green substance
  3. 4. you only change one variable in an experiment
  4. 6. helps plants grow
  5. 9. photosynthesis need this object to work
  6. 10. you breath this in
Down
  1. 1. you breath this out
  2. 5. causes heat in your body and helps you breath
  3. 7. you put this in your hot drink
  4. 8. control all the functions in a cell