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Lenntech: The Phosphorus Cycle
A concise explanation of the phosphorus cycle. Also contains a flow diagram which illustrates the flow of phosphate through the cycle.
Ducksters
Ducksters: Chemistry for Kids: Elements: Phosphorus
This site includes information about phosphorus's atomic weight, atom, uses, sources, name, and discovery. Plus properties and characteristics of phosphorus are discussed.
Geography 4 kids
Geography4 kids.com: Cycling Phosphorus
An essential element in the ecosystem is phosphorus. Discover the phosphorus cycle, what depends upon it, and how it works.
Science Struck
Science Struck: Red Phosphorus Uses
Describes some of the characteristics of phosphorus, what red phosphorus is specifically, as well as the uses of red phosphorus.
Science Struck
Science Struck: Phosphorus Uses
Describes some of the properties of phosphorus and how it is used in the human body, in plant nutrition and growth, and commercially.
Ohio State University
Ohio State University: Concepts of Plant Ecology
An advanced discussion of plant interactions and relationships. Energy flow, nutrient cycling and succession are discussed. Try the quiz to check your understanding.
Other
Marietta College: Ecosystems
Complete illustrated discussion of energy flow within ecosystems, including discussions of trophic levels, ecological pyramids, food chains and webs, biological magnification, and cycles.
University of Illinois
University of Illinois Extension: Energy and Ecosystems Use Some Lose Some
Life on Earth is possible because energy flows one way through ecosystems, while matter cycles endlessly. Water and elements, such as carbon, nitrogen, phosphorous, and sulfur are examples of matter that cycles through ecosystems.
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