Geocycles Worksheet Movie Summary: lanet Earth is an amazing machine, and we—and our future—are riding on it. This video introduces students to the Earth system’s primary interacting subsystems (the biosphere, geosphere, hydrosphere, and atmosphere); the nitrogen, carbon,... (more details for Geocycles*)

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File #751 Info: Created by Jim Perkins on September 14, 2009 using Illinois State standards for students at a grade 9-10 level.

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