Nitrogen Cycles Project: 8. Choose a Nitrogen Cycle Sphere

	Overview
	Biogeochemical Cycles
	Spheres of B. Cycles
	Nitrogen Properties
	Simple Nitrogen Cycle
	Human Influences
	Spheres of the N Cycle
	Choose a Sphere
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Glossary

Graph of the four spheres of the N Cycle. Choices
include Atmosphere, Biosphere, Geosphere, and Hydrosphere

A pictorial view of the N spheres showing some of the major transfers between the spheres and reservoirs of N within the spheres.

Choose a sphere: Atmosphere Biosphere Geosphere Hydrosphere

Overview w B. Cycle w Spheres w N Props w N Cycle w Influences w N Spheres