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Cycles
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Kids_and_Teens
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Science
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The_Earth
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Cycles
Carbon
Nitrogen
Phosphorus
Water
3
Sites in Cycles
Biogeochemical Cycles
A brief look at the major nutrient cycles, including pictures.
http://www.colorado.edu/GeolSci/courses/GEOL1070/chap04/chapter4.html
Olympic Hands on the Land - Cycles
From the National Park Service, animated diagrams of the water, nitrogen, and carbon cycles. Includes explanations.
http://www.nps.gov/olym/hand/nutrition1.htm
Water What Ifs - Water Quality and Nitrates and Phosphates
Shows the inter-relationship of these surface water parameters.
http://www.ncsu.edu/sciencejunction/depot/experiments/water/lessons/np/
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