Cycling Crossword Puzzle

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Across
  1. 3. the main sugar found in your blood
  2. 5. the decomposition of buried carbon-based organisms
  3. 6. the loss or removal of nitrogen or nitrogen compounds
  4. 9. A large group of single-cell microorganisms
  5. 11. a chemical reaction between substances
  6. 13. greenhouse gas
  7. 15. a process in living organisms involving the production of energy
  8. 16. Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy
  9. 17. a period of unusual dry weather that long enough to cause serious problems
  10. 18. the state or process of rotting; decay.
Down
  1. 1. water that falls from the clouds towards the ground
  2. 2. The excess liquid flows across the surface of the land and into nearby creeks, streams, or ponds.
  3. 4. a rapid increase or accumulation in the population of algae in freshwater or marine water systems.
  4. 7. liquid to a gas
  5. 8. a mixture of gases that surrounds the Earth
  6. 10. a underground layer of water-bearing, permeable rock, rock fractures, or unconsolidated materials.
  7. 12. the process of converting free nitrogen in the atmosphere into nitrogen molecules
  8. 14. Condensation is the process where water vapor becomes liquid