Chapter 4 Review Crossword

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