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This text and accompanying video describe Yellowstone National Park, the site of a 'hot spot' that runs from Earth's mantle to its crust, producing nearly 10,000 geothermal features, all heated by underground lava reservoirs. Topics include some of these features (geysers, mudpots, steam vents), and a discussion of how cold rainwater seeps downward to become superheated and laden with dissolved minerals. There is also a video adapted from the television program 'ZOOM', in which a young guide offers viewers a tour of the park and explains how Earth's internal heat fuels geothermal formations. Discussion questions are included.
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