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Handout
Encyclopedia of Earth

Encyclopedia of Earth: Biogeochemistry: Phosphorus Cycle

For Students 9th - 10th
Article explaining what the phosphorus cycle is, where it occurs, its place in the biotic world, and the environmental impact of human activities on the phosphorus cycle. (Published: October 8, 2009)
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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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Handout
Precision Nutrition

Encyclopedia of Food: Phosphorus

For Students Pre-K - 1st
Find out how humans can acquire phosphorus and why it is important to the body.
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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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Article
Society for Science and the Public

Science News for Students: Like Poison for Phosphorus

For Students 9th - 10th
Discusses a research study undertaken at Mono Lake in California, known for its extreme salty conditions, which supports unusual life forms. Scientists found that a bacterium could survive using arsenic instead of phosphorus,...
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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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Handout
Science Struck

Science Struck: Ground State vs. Excited State of an Atom

For Students 9th - 10th
Explains what Bohr's model of the atom is, the characteristics of the ground and excited states of an atom, and the electron configuration for each in the example of Phosphorus.
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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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