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Handout
Other

Lenntech: The Phosphorus Cycle

For Students 9th - 10th
A concise explanation of the phosphorus cycle. Also contains a flow diagram which illustrates the flow of phosphate through the cycle.
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Website
Ducksters

Ducksters: Chemistry for Kids: Elements: Phosphorus

For Students 1st - 9th
This site includes information about phosphorus's atomic weight, atom, uses, sources, name, and discovery. Plus properties and characteristics of phosphorus are discussed.
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Website
Geography 4 kids

Geography4 kids.com: Cycling Phosphorus

For Students 5th - 8th
An essential element in the ecosystem is phosphorus. Discover the phosphorus cycle, what depends upon it, and how it works.
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Handout
Science Struck

Science Struck: Red Phosphorus Uses

For Students 9th - 10th
Describes some of the characteristics of phosphorus, what red phosphorus is specifically, as well as the uses of red phosphorus.
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Handout
Science Struck

Science Struck: Phosphorus Uses

For Students 9th - 10th
Describes some of the properties of phosphorus and how it is used in the human body, in plant nutrition and growth, and commercially.
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Handout
Ohio State University

Ohio State University: Concepts of Plant Ecology

For Students 9th - 10th
An advanced discussion of plant interactions and relationships. Energy flow, nutrient cycling and succession are discussed. Try the quiz to check your understanding.
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Handout
Other

Marietta College: Ecosystems

For Students 9th - 10th
Complete illustrated discussion of energy flow within ecosystems, including discussions of trophic levels, ecological pyramids, food chains and webs, biological magnification, and cycles.
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Article
University of Illinois

University of Illinois Extension: Energy and Ecosystems Use Some Lose Some

For Students 4th - 5th
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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