Q. 15 Describe in brief the bio-geochemical cycles in nature :
(3) Nitrogen cycle
std. 9th
science
chapter 7. Energy flow in an ecosystem
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A biogeochemical cycle is the pathway by which a chemical substance cycles (is turned over or moves through) the biotic and the abiotic compartments of Earth. The biotic compartment is the biosphere and the abiotic compartments are the atmosphere, hydrosphere and lithosphere.
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Nitrogen Cycle
It is the biogeochemical cycle by which nitrogen is converted into several forms and it gets circulated through the atmosphere and various ecosystems such as terrestrial and marine ecosystems. Nitrogen is an essential element of life.
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