Across
- 5. that involves the weathering of rocks and is essential for DNA
- 7. where organisms break down dead material
- 8. turning into vapor and rising into the atmosphere
- 10. Gas that bacteria convert into usable forms for plants
- 13. soaking into the ground
- 14. plants use to convert CO₂ and water into glucose
- 15. flowing over land into rivers and lakes
Down
- 1. process that releases carbon dioxide
- 2. these releases carbon stored for millions of years
- 3. snow, sleet, or hail falling from clouds
- 4. that releases CO₂ back into the atmosphere
- 6. that moves through the atmosphere, organisms, and oceans
- 9. of converting atmospheric nitrogen into usable forms
- 11. vapor cooling and forming clouds
- 12. of water through evaporation, condensation, and precipitation