biogeochemical cycles

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Across
  1. 2. P
  2. 6. a worldwide, major environmental concern caused by the excessive amount of CO2 in the atmosphere
  3. 8. process used to obtain drinkable water from the ocean
  4. 10. animals and plants both do this, uses glucose and oxygen
  5. 11. the most abundant element in living things
  6. 12. ammonia plus oxygen creates this compound used by plants and made into fertilizer
  7. 18. element of life that is released in rock weathering
  8. 20. organisms such as bacteria and fungi that break down waste and dead organisms
  9. 21. global climate change is driven mostly by carbon ___
  10. 22. 78% of our atmosphere
  11. 23. the main oxygen generators of the biosphere
Down
  1. 1. plants do this to make glucose and oxygen
  2. 3. contains 97% of the biosphere's water
  3. 4. name of bacterium that can fix nitrogen
  4. 5. beginning of this revolution is marked by the rise in use of fossil fuels
  5. 7. the second most abundant element in living things
  6. 9. the powerhouse of the cell
  7. 13. produce their own food molecules from sunlight
  8. 14. means non-living
  9. 15. ATP is adenosine tri____
  10. 16. C6H12O6
  11. 17. coal, natural gas, petroleum are ___ fuels
  12. 18. which contains nitrogen, carbohydrate or protein
  13. 19. ocean acidification can result in ___ bleaching