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can you please explain the nitrogen cycle and carbon cycle step by step

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Carbon Cycle-

  1. Main key process involved in carbon cycle are photosynthesis and respiration. In photosynthesis carbon-dioxide and water produce carbohydrate and oxygen. While respiration oxidize food to give carbon-dioxide and water.
  2. In ocean and in rocks carbon-dioxide dissolves readily in water. In rock it get stored as calcium carbonate.
  3. Carbon can either be liberated to atmosphere through respiration or can be passed to animal when being eaten or remain in plant even after death.
  4. After death of plant or animal decomposition take place and carbon dioxide get released to atmosphere. They can also be buried inside the earth and converted to coal or natural gas . Natural gas and Coal are fuels and on combustion they release carbon dioxide back into the atmosphere.
  5.  Carbon dioxide goes into the oceans and excess of carbon-dioxide can cause global warming.

 

Nitrogen cycle-

1) Nitrogen exist in many forms in atmosphere and can be inter converted from one form to other by many organism. Nitrogen is main component of amino acid which is a main part of protein, a structural unit of our body.

http://www.etap.org/demo/biology_files/lesson6/kep16.jpg2) Nitrogen gas is inert but in the presence of lightening it can change to nitrate and other oxides of nitrogen and can be fixed in the atmosphere.

3) nitrogen can also be fixed by nitrogen fixing bacteria cyanobacteria.  They fix nitrogen in the form of nitrates.

4) Plants take up nitrates from the soil and convert it to amino acid.

5) When plants and animal die nitrogen return back to the soil through decomposers.

 

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hi! hope this will the answer-

The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms. This transformation can be carried out by both biological and non-biological processes. Important processes in the nitrogen cycle include fixation,nitrification etc.

Nitrogen is present in the environment in a wide variety of chemical forms including organic nitrogen,ammonium (NH4+), nitrite (NO2-),nitrate (NO3-),nitrous oxide (N2O), nitric oxide(NO) or inorganic nitrogen gas (N2). Organic nitrogen may be in the form of a living organism, humus or in the intermediate products of organic matter decomposition. The processes of the nitrogen cycle transform nitrogen from one form to another. Many of those processes are carried out by microbes, either in their effort to harvest energy or to accumulate nitrogen in a form needed for their growth. 

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 The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere,    pedosphere , geosphere ,hydrosphere, and atmosphere of the Earth. It is one of the most important cycles of the earth and allows for carbon to be recycled and reused throughout the biosphere and all of its organisms.

The annual movements of carbon, the carbon exchanges between reservoirs, occur because of various chemical, physical, geological, and biological processes. 

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The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms. This transformation can be carried out by both biological and non-biological processes. Important processes in the nitrogen cycle include fixation, mineralization, nitrification, and denitrification. The majority of Earth's atmosphere (approximately 78%) is nitrogen,[1] making it the largest pool of nitrogen. However, atmospheric nitrogen has limited availability for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems. The nitrogen cycle is of particular interest to ecologists because nitrogen availability can affect the rate of key ecosystem processes, including primary production and decomposition. Human activities such as fossil fuel combustion, use of artificial nitrogen fertilizers, and release of nitrogen in wastewater have dramatically altered the global nitrogen cycle.

 
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The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth. It is one of the most important cycles of the earth and allows for carbon to be recycled and reused throughout the biosphere and all of its organisms.[citation needed]

The carbon cycle was initially discovered by Joseph Priestley and Antoine Lavoisier, and popularized by Humphry Davy.[1] It is now usually thought of as including the following major reservoirs of carbon interconnected by pathways of exchange:

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