Vision Learning
Visionlearning: Earth Cycles: The Phosphorus Cycle
An introduction to the significance of phosphorus in regards to living organisms. An explanation of the phosphorus cycle is discussed in different scenarios.
Encyclopedia of Earth
Encyclopedia of Earth: Phosphorus
Information about the element, Phosphorus, atomic number 15. Covers physical and atomic properties, the phosphorus cycle, phosphorus chemistry, and how exposure to white phosphorus affects human health.
Encyclopedia of Earth
Encyclopedia of Earth: Physics & Chemistry: Phosphate
Discusses what phosphates are, their role in the phosphorous cycle, where they occur in the natural world, their chemistry, and the impact of the use of phosphate fertilizers in agriculture.