Across
- 2. Carbon comp. that are eaten for usable energy (ex. sugar)
- 3. Plants with nitrogen-fixing bacteria in their roots
- 5. Coal, Oil, Gas
- 6. Absorb more carbon than they release
- 8. Store and release carbon slowly
- 11. Greenhouse gas; largely produced by cattle
- 13. Carbohydrates and oxygen are byproducts
- 15. Respiration in the absence of oxygen
- 17. Most abundant element in the air
- 18. Process that converts ammonium and nitrate back to N2
- 20. Increases the solubility of phosphate
- 21. For structure and body functions
- 22. Nitrogen gas is "fixed" with hydrogen to produce this
Down
- 1. Key element for all living things
- 2. Glucose and Oxygen are reactants
- 4. Produced by nitrification
- 7. Greenhouse gases raise the global ___________
- 9. Respiration that uses oxygen
- 10. Matter that always contains Carbon and Hydrogen
- 12. Not of biological origin
- 14. Chemicals that an organism must have to live and grow
- 16. Energy molecule with three phosphate groups
- 19. Part of the plant where photosynthesis occurs