Gravity from the moon creates tides on earth that go out two times a day, every day of the year. This effect of the moon's gravity on the oceans can be harnessed and turned into power. This Show Me Science - The Wonders of Oceanography DVD explores how tidal power is generated and how it works. It illustrates how the tides are created, how watermills once used the tides to grind grain, and how modern power plants use turbines to turn this constant flow of water into electricity. It also discusses how tidal power plants can work without damming estuaries and rivers. Comes complete with online teacher's guide which includes subject matter revision and suggestions on how to present material, questions to ask students, career possibilities and class projects to help illustrate the key concepts. Grades 4-9. 14 minutes on DVD.
DVD Playable in Bermuda, Canada, United States and U.S. territories. Please check if your equipment can play DVDs coded for this region. Learn more about DVDs and Videos
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