Across
- 2. air
- 3. what happens when the carbon passes through
- 5. a group of atoms bonded together
- 6. sugar
- 8. what we breathe in
- 10. processes that take place in the cells of organisms to convert chemical energy from oxygen molecules or nutrients
Down
- 1. a colorless, odorless gas produced by burning carbon and organic compounds
- 4. process used by plants and other organisms to convert light energy into chemical energy
- 7. water
- 9. oxygen that comes through the leaf