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| Description: |
Three videos, Ecosystems on Earth, Food Chains in the Biosphere,
and Chemical Cycles in the Biosphere, on one DVD.
Ecosystems on Earth
What is the state of the world's ecosystems as the 21st century begins? A primer on ecosystem problems and opportunities with the stress on new efforts to save endangered species, new efforts to avert global warming and new efforts to preserve and restore to health all ecosystems, including agricultural and urban ones.
Food Chains in the Biosphere
Students will learn how producers, consumers, decomposers and the abiotic elements are connected in ecosystems and how ecosystems make up a biosphere. Program features new computer graphics and live-action video illustrating important concepts in modern ecology.
Chemical Cycles in the Biosphere
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.
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| Price: |
$79.95
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| Copyright: |
©2002
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| Format: |
1 DVD
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| Length: | 61 minutes
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| UPC: | 69394 0231131
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| Study Guides: |
Study Guide Questions
Study Guide Answers
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| Special Features: |
Subtitled. |
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