Difference between oxygen cycle and nitrogen cycle list 6
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Oxygen Cycle
After carbon, oxygen is one of the most abundant elements on earth. About 21% of our air is composed of oxygen. It is also an atom in the molecule of water (H2O). Oxide compounds, such as CO2 also contain oxygen.
As we are aware oxygen is absolutely essential for all living organisms to survive. It is the main component in respiration. It is also the element that allows and assists combustion of any kind. Through photosynthesis, the replenishment of oxygen in the atmosphere is done, where oxygen is one of the by-products. In fact, photosynthesis and respiration are interdependent mechanisms that perform a unique and amazing balancing.
Nitrogen Cycle
Nitrogen is available in abundance in our atmosphere (78%), however, this nitrogen is useless to animals and plants until it is converted to ammonia and other nitrogen compounds. This conversion process is called Nitrogen Fixation. And through a process is called denitrification, once these plants and animals are dead, this ammonia is broken down by bacteria and fungi and returned to the atmosphere as Nitrogen.