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Slide Notes

The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms. This transformation can be carried out through both biological and physical processes.
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Nitrogen Cycle

Published on Nov 18, 2015

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PRESENTATION OUTLINE

Nitrogen Cycle

the process by which it is is converted between its various chemical forms
The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms. This transformation can be carried out through both biological and physical processes.

Biogeochemical cycle:
Pathway by which a chemical substance moves through both biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth.

Like carbon, nitrogen also has always been present on the earth, and in the nitrogen cycle, nitrogen cycles through the global environment. Nitrogen is also a chemical element, and it is the most abundant element in the atmosphere, making up 78% of the atmosphere. Nitrogen is very unreactive with other elements, and it cannot be used directly as a nutrient by plants and animals the way oxygen or carbon can. However, nitrogen can be converted into forms usable by plants and animals either by lightning or bacteria. Once converted to usable forms, nitrogen is able to cycle the rest of the way through the ecosystem.

Biogeochemical Cycle

pathway where a chemical substance moves through biotic and abiotic compartments of Earth
a biogeochemical cycle or substance turnover or cycling of substances is a pathway by which a chemical substance moves through both biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth. A cycle is a series of change which comes back to the starting point and which can be repeated.

Energy movement

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Movement of Matter in Nitrogen Cycle

  • Matter is continually recycled among living and abiotic elements on earth
  • Nitrogen cycles facilitate the transfer of matter from one form to another and from one location to another on planet earth.
  • nutrient cycles, because they involve the transfer of compounds that provide nutritional support to living organisms
Therefore, matter that Earth contained from the time of its birth is transformed and circulated geographically. This is in line with the law of conservation of matter which states that matter cannot be created nor destroyed but can be transformed including the transformation between matter and energy - Matter is continually recycled among living and abiotic elements on earth. Biogeochemical cycles facilitate the transfer of matter from one form to another and from one location to another on planet earth. Additionally, biogeochemical cycles are sometimes called nutrient cycles, because they involve the transfer of compounds that provide nutritional support to living organisms. - See more at: http://www.eoearth.org/view/article/150616/#sthash.wM7FRkTu.dpuf

1st Law Thermodynamics

 energy is always conserved, it cannot be created or destroyed

The 2nd law of Thermodynamics

The second law of thermodynamics is a general principle which places constraints upon the direction of heat transfer and the attainable efficiencies of heat engines.
The second law of thermodynamics is a general principle which places constraints upon the direction of heat transfer and the attainable efficiencies of heat engines.

Earth Cycle Diagram

Simplified Diagram