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