Biogeochemical cycles Sean Cherney


The water cycle is a natural reoccuring process, where water goes through different forms always making a complete circle when it is completed. It starts out as evaporation when the water molecules are taken up into the atmosphere. Clouds then form due to an accumulation of water particles, then rain down as precipitation. The cycle can also begin when a plant transpires and condensation occurs then rains down as precipitation.

Water's scientific chemical equation

2H2+ O2 ----> 2H2O

H+(Aq)+OH - (Aq) -> H2O

Water is inorganic because it does not contain any carbon, in all forms water contains no carbon. Trees however are a crucial point to the water cycle and they are organic however. Tree's contain carbon and transpire putting water back into the atmosphere.

Water moves up when it evaporates going into the atmosphere. Water then condenses and condensation is formed in clouds. Water then falls down back to the earth through the process of perception.

Humans effect the natural water cycle by putting too much carbon into the atmosphere and cutting down trees that are necessary for the water cycle to continue.


Nitrogen is naturally all around in the atmosphere, the bond between two nitrogen atoms is very strong but can be broken. Lighting can break the bond as well as certain types of bacteria. The bacteria separate the bond making the nitrogen bond with other stuff forming Ammonia. Ammonia is then converted to Nitrites after fixation, then to Nitrates by bacteria. Plants then absorb this and use it to create essential proteins.

Nitrogens Chemical equation

All forms of Nitrogen in the NItrogen cycle have no organic material in them. There are no carbons in any of them. Although a huge part of the nitrogen cycle occurs in bacteria that is indeed organic, (because they contain carbon). Also plants and animals are responsible for helping complete the nitrogen cycle and they are organic because they have carbon in them too.

Human action is responsible for harming the natural nitrogen cycle. Humans burn a lot of fossil fuels that put too much carbon into the atmosphere disrupting the balance of nitrogen and carbon.


The carbon cycle is a natural process that puts carbon in many different places. Carbon is naturally found in the atmosphere. Plants then take in carbon and then animals eat those plants. So all livings things contain carbon, so that's why organic material is decided based on if that thing has carbon in it.

Chemical equation for the carbon cycle

Although carbon is necessarily associated with organic material. Carbon in the atmosphere is non organic, But it is organic once it is in plants and animals. Organic classification is based on if a thing has carbon in it because only living things can contain carbon.

Human action is harming the carbon cycle. Humans burn too much fossil fuels that puts too much carbon into the atmosphere. Humans need to stop emitting so much pollutants into the atmosphere because the carbon cycle suffers from it.


The phosphorus cycle is a natural process that spreads phosphorus throughout the earth. Eventually with enough rainfall on rocks, phosphorus is distributed in soil and water. Plants then take the inorganic phosphorus up from the soil. Animals then will eat those plants. Once the animal dies, the body decays and the organic phosphate is incorporated into the soil. Then certain bacteria breaks down the phosphate, this process is called mineralization.

Phosphorus chemical equation

The Phosphorus cycle starts off as inorganic and later becomes organic once taken up by plants. When the plants get eaten by animals, eventually the animals die and decompose. Bacteria then breaks down the animals and the phosphate inside.

Humans have a big impact on the phosphorus cycle. When humans use fertilizer as well as raising livestock, too much phosphorus gets into the ground. This disrupts the Phosphorus cycle as a whole.


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