Welcome to the Biology Links page!
Cycles - water, carbon, nitrogen and phosphorus
Carbon
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Carbon Cycle - all text, no pics but good info
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Carbon Cycle at Wikipedia, the online encyclopedia- a very complete and thorough amount of information
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Carbon Cycle in a Canadian Forest - very thorough
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Carbon Cycle Simulation *currently not working* but a promising site if issues can be resolved
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Chemical Carousel - A Trip Around the Carbon Cycle
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EPA
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Interactive game - requires that you understand the carbon cycle before you try to play.
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Nasa
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Stars and Seas Carbon Cycle
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Tutorial on The Oxygen/Carbon Dioxide Cycle - some diagrams and easy to understand, step-by-step information
Nitrogen
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An interactive diagram: you click on an aspect of the cycle or a state of nitrogen and the diagram will simplify to show you which part of the cycle it applies to.
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Animation of the Nitrogen Cycle
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Nitrogen Cycle - NYU.edu
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PhysicalGeography.net
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Stars and Seas Nitrogen Cycle
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The Microbial World:The Nitrogen cycle and Nitrogen fixation
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The Nitrogen Cycle - thinkquest
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World Resources Institute - Nutrient Overload
Water
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Droplet and the Water Cycle - on line game to explore the water cycle - by NASA
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Earthscape Hydrologic Cycle
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Institute of Water Research - water cycle
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Institute of Water Research, Michigan State University
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Stars and Seas Water Cycle
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The Water Cycle - good, basic info - be sure to click on the links in the upper left corner for more information.
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USGS - Water Science for schools - great site - available in many different languages too!
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Water Cycle - from Kidzone - very basic, easy to understand information
Images