Across
- 2. process of plants and animals to release carbon dioxide
- 5. conversion of nitrites into nitrates
- 9. breakdown of nutrients which allows soil to become nutrient rich
- 10. burning fossil fuels
- 11. the removal of nutrients as water passes through soil
- 12. take in carbon dioxide and release oxygen
- 13. excess nutrients entering aquatic ecosystem
Down
- 1. dead materials that sink to the bottom of the ocean
- 3. conversion of nitrates to nitrogen gas
- 4. process plants use to draw water from the ground
- 6. decomposers turning waste into bacteria
- 7. sinking of water into the ground
- 8. taking up nutrients by roots