When nitrogen is converted into many different forms as it goes through the atmosphere, terrestrial, and marine ecosystems. It starts out as bacteria converting nitrogen gas into ammonia which plants use. The second step is when ammonia is converted into nitrate ions that plants take in as nutrients. After living organisms use this nitrogen the next step in the cycle is ammonification, where decomposing bacteria convert the waste compounds into simpler compounds. The last and final step is denitrification, where bacteria converts simple nitrogen compounds back into nitrogen gas, which then the gas returns to the atmosphere and starts the cycle again.
Chemical reactions: Fixation, Nitrogen Fixation, Ammonification, Nitrification, Denitrification
Organic Compounds: Bacteria and decomposed animals
Inorganic Compounds: Nitrogen, Nitrate, Nitrate ions, Water
Human Interactions: Automobiles, Factories, Power plants, and other combustion processes which puts more Nitrogen into the atmosphere which affects the Nitrogen cycle.