The Phosphorous Cycle

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  • Topic: Phosphorus, Phosphate, Fertilizer
  • Pages : 3 (555 words )
  • Download(s) : 75
  • Published : January 26, 2011
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The phosphorous cycle

Done By: Jamila Richardson and Janice Foster
Teacher: Mr. Hunter
School: Quality Academics

Table of contents
What is the Phosphorus Cycle……………………………………… 1 Description of Phosphorus …………………………………………. 1 Pictures………………………………………………………………2-3 Description of the Cycle…………………………………………….4-6 Human Influences……………………………………………………7 Bibliography………………………………………………………….8

What is the Phosphorus cycle?

The phosphorus cycle is the biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere. Unlike many other biogeochemical cycles, the atmosphere does not play a significant role in the movements of phosphorus, because phosphorus and phosphorus-based compounds are usually solids at the typical ranges of temperature and pressure found on Earth.

Description of Phosphorus
Most common form of phosphorus is red and white.
Both are tetrahedral groups of four atoms.
White phosphorus burns on contact with air and can change into red phosphorus when exposed to light or heat. White phosphorus has two modifications.
Ordinary phosphorus is waxy white solid.
When pure it is colorless and transparent.
Pure phosphorus is insoluble in water but soluble in carbon disulphide catches fire spontaneously in air.

Description of the cycle

Simplest of the cycles
Phosphorus has only one form – phosphate
Always part of an organism, dissolved in water, or in the form of rock Phosphorus enters environment from rocks or deposits
Apatite is the phosphate rock where phosphate is available Weathering and erosion releases phosphate ions that are soluble in water

Phosphate then acts as fertilizers or nutrients for land plants It gets incorporated into molecules essential for life like ATP, adenosine triphosphate – this is important in storage and use of energy Phosphate is in backbone of DNA and RNA

When animals and plants die, phosphates will...
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