BIOGEOCHEMICAL CYCLES CROSSWORDS

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Across
  1. 4. The chemical backbone of all life on Earth.
  2. 7. When water that falls from the clouds as rain, snow, hail or sleet, collects in the oceans, rivers, lakes, streams.
  3. 8. A cycle that helps move oxygen through the three main regions of the Earth, the Atmosphere, the Biosphere, and the Lithosphere.
  4. 9. Occurs when there is more water than land can absorb.
  5. 10. Vital to all organisms and its availability influences rates of ecosystem processes.
  6. 12. Common term used for a harmful algal bloom.
  7. 13. A colorless, odorless gas produced by burning carbon and organic compounds and by respiration.
  8. 15. A process carried out by nitrifying bacteria, transforms soil ammonia into nitrates (NO3−), which plants can incorporate into their own tissues.
  9. 17. Change of the physical state of matter from the gas phase into the liquid phase.
  10. 22. Process by which chemicals present in organic matter are decomposed or oxidized into easily available forms to plants.
  11. 24. The microbial process of reducing nitrate and nitrite to gaseous forms of nitrogen.
  12. 25. Process by which plants and animals incorporate the NO3- and ammonia formed through nitrogen fixation and nitrification.
  13. 28. The change of a liquid to a gas.
  14. 29. Nitrogen gas is converted into inorganic nitrogen compounds.
  15. 30. Primary process that converts reduced organic nitrogen (R–NH2) to reduced inorganic nitrogen (NH4+) through the action of microorganisms.
  16. 31. A component of proteins and nucleic acids, is essential to life on Earth.
Down
  1. 1. A cycle that includes nitrogen, oxygen, carbon, and water.
  2. 2. A cycle that includes phosphorus, sulfur, and trace elements.
  3. 3. A component of nucleic acids, phospholipids, and ATP and other energy storing molecules.
  4. 5. The process used by plants and other organisms to convert light energy into chemical energy.
  5. 6. Precipitation that does not reach the soil.
  6. 11. Sum of evaporation from the land surface plus transpiration from plants.
  7. 14. The process by which groundwater exits the ground.
  8. 16. Occurs when any organic material is burned in the presence of oxygen.
  9. 18. A biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems.
  10. 19. the conversion of water from liquid to gas as it passes through plants.
  11. 20. Product of the condensation of atmospheric water vapor that falls under gravitational pull from clouds.
  12. 21. Process by which water on the ground surface enters the soil.
  13. 23. Process in which nitrate and ammonium are taken up by soil organisms and therefore become unavailable to crops.
  14. 26. The act or process of breathing by plants and animals.
  15. 27. Is essential for aerobic respiration in animals.