Across
- 2. reservoir carbon stored on the Earth
- 7. plants use radiant energy to produce sugar and oxygen from carbon dioxide and water.
- 9. water on the Earth
- 10. respiration process where animals produce carbon dioxide and water from sugar and oxygen
- 11. all the gases surrounding the Earth
Down
- 1. upper layer of the Earth
- 2. sink reservoir that absorbs carbon from the atmosphere
- 3. total mass of living things
- 4. fuel fuel formed from living things
- 5. rocky part of the Earth
- 6. living things on the Earth
- 8. gas carbon dioxide or any gas that warms the Earth