Product Details: Item #2305
   Chemical Cycles in the Biosphere
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    Description: Video footage from around the world and updated informative computer graphics show how chemicals cycle within the biosphere. Emphasized are the oxygen-carbon dioxide cycle, the nitrogen cycle, the water cycle, acid rain and how toxic chemicals can affect the biosphere.
    Price: $59.95
    Copyright: ©2004
    Format: 1 DVD
    Length:27 minutes
    UPC:69394 0230530
    Study Guides: Study Guide Questions
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    Special Features:
    An interactive DVD with added questions and quizzes. Subtitled.

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    Educational Video Network
    1401 19th Street
    Huntsville, TX 77340
    (936) 295-5767
    (936) 294-0233
    EVN - "Your leading source for curriculum-based
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