Biogeochemical Cycles Bethany Brown

The Water Cycle

The water cycle is movement of water in and on the earth. Water changes into different states during the water cycle (Vapor, liquid and ice). The water cycle in a continuous movement. Volcanic activity is the source of all the earth's water. The water from bodies of water is evaporated in the clouds in the atmosphere and enter condensation, after condensation the water enters precipitation and is brought back down on/ in the land. Water can runoff back in to bodies of water or be infiltrated into the ground. Plants will absorb water and water will transpiration into the atmosphere and the cycle restarts.

No real chemical reactions in the water cycle. The different states of water is due to temperature change.

organic components of the water cycle are the bodies of water.

There are no inorganic components in the water cycle. The only organic component is water.

Humans have impacted the cycle with construction. The roads and concrete have reduced the amount of runoff and groundwater to the oceans and rivers.

the Nitrogen cycle

All living organisms need Nitrogen to survive. Nitrogen is in organisms DNA, RNA, and in proteins and is 78% of the atmospere. Most of the Nitrogen in the air in unreactive because of its triple bond. In The Nitrogen cycle, Nitrogen has to go through processes to convert Nitrogen into ammonium and nitrate because it's more chemically available which makes it reactive for organisms. Nitrogen moves between the atmosphere, biosphere, and geosphere in inorganic, organic forms and different oxidation states.

Nitrogen Fixation, Nitrification, Denitrification, and Ammonification are the chemical reactions in The Nitrogen Cycle. Nitrogen Fixation is the process where the Nitrogen in are is converted to ammonia by Nitrogen bonding with hydrogen. Nitrification is the process where ammonia is changed to Nitrites and then Nitrates. Denitrification is where certain bacteria will turn Nitrate back into Nitrogen. Ammonification is the process of plant and waste decomposing and releasing ammonia into the soil.

The Inorganic components in The Nitrogen Cycle are Nitrogen, Ammonium, Nitrite, and Nitrate. The Organic component is Ammonia.

Nitrogen levels in the water are rarely over 1 mg/L due to human activity. Fertilizers are rich in nitrogen and they get in the water by runoff or groundwater runoff. This adds more Nitrogen to the Water than needed. Due to human activities the nitrogen in the air has increased and caused temperatures to rise and create holes in the ozone layer.

The Carbon Cycle

carbon is found in our oceans, rocks, soil, air and all living things contain carbon. In The Carbon Cycle carbon joins oxygen and is pulled from the air to make plant food. Once the plants absorb the carbon the animals consume the plants. Once the plants and animals die their bodies decay and the ground absorbs the carbon in their bodies. Another way carbon is released in the air is by living organisms exhaling, when living organisms exhale their release carbon dioxide which is the same compound that is created when carbon joins oxygen. Without carbon in the atmosphere the earth would freeze and with too much carbon the atmosphere would rise in temperature.

The only chemical reaction in The Carbon Cycle is photosynthesis turning carbon into oxygen.

The inorganic and organic components in The Carbon Cycle is water and carbon. Carbon goes through different processes in the cycle to make it an organic or inorganic component.

Human activities in The Carbon Cycle manly occur when they burn fuels, the fuels like cars and factories release more carbon in the air that what is usually there. There is 30% more carbon in the atmosphere due to human activities causing the earth's temperature to rise. And some of the Carbon in the air is absorbed by the ocean.

The Phosphorus Cycle

Phosphorus holds DNA and RNA together as well as give living organisms energy. 80% is found in the teeth and bones of organisms. In The Phosphorus Cycle it does not enter the atmosphere due to temperatures and pressures from the Earth. Phosphorus is found in rocks a is released by rain when the rock weathers and enters the soil, plants, then animals. Phosphorus reenters the soil by decay and waste product.

There are no chemical reactions in The Phosphorus Cycle.

The inorganic phosphorus was what was released from the weathering rocks and the plans and waste are the organic phosphorus.

Human fertilizers impact The Phosphorus Cycle. Plants can not obtain all the phosphorus and cause it to runoff into streams.


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