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The Chemical Cycles

The Chemical Cycles. Chemical cycles. Unlike energy, matter can be recycled. The Carbon and Nitrogen Cycles are the two main ways matter is recycled in the environment. The Nitrogen Cycle. Organisms require nitrogen to produce amino acids. Nitrogen makes up 78% of the air we breathe

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The Chemical Cycles

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  1. The Chemical Cycles

  2. Chemical cycles • Unlike energy, matter can be recycled. The Carbon and Nitrogen Cycles are the two main ways matter is recycled in the environment.

  3. The Nitrogen Cycle Organisms require nitrogen to produce amino acids. Nitrogen makes up 78% of the air we breathe Most organisms can not use this form of nitrogen, and must have the fixed form.

  4. The Nitrogen Cycle The nitrogen cycle produces the fixed form of nitrogen these organisms need.

  5. The Nitrogen Cycle

  6. The Nitrogen CycleSteps Step 1:  Nitrogen Fixation- bacteria take in nitrogen from the air and produce ammonia (NH3). Step 2:  Nitrification. Other bacteria use this ammonia to make nitrates and nitrites. Step 3:  Assimilation. The nitrates and nitrites are used by plants to make amino acids and proteins. Step 4: Denitrification. Decomposers return the nitrogen found in other organisms back into the soil.

  7. The Carbon Cycle • The Carbon Cycle describes the flow of carbon between living organisms and the non-living environment. • Carbon cycles through the environment in the form of a gas, carbon dioxide (CO2). The atmosphere of Earth contains .04 percent CO2. • Living organisms provide two important steps in the carbon cycle: • Plants absorb CO2 from the atmosphere to use during photosynthesis. • Other organisms release CO2 into the air during respiration.

  8. The Carbon Cycle

  9. In addition, there are several important non-organic storage areas of carbon in the environment: • A large portion of the Carbon on the Earth is stored in rocks. • The Earth's oceans hold a large amount of CO2 because it easily dissolves in water. • Coal, oil, and limestone store carbon that once formed ancient organisms. Burning fossil fuels, like coal and oil, will release CO2 into the atmosphere.

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