| Directory > Kids and Teens > School Time > Science > The Earth > Cycles 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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Life Materials and Nutrient Cycles
How life shares materials, why we need each other's "leftovers," water cycle, carbon
cycle, nitrogen cycle, and sulfur cycle, including diagrams.
http://cgee.hamline.edu/see/questions/dp_cycles/dp_cycle_nutr.htm
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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
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