Resource: How to Build an Island from Scratch
Media Type:
QuickTime Video
Length: 0m 43s
Size: 2.2 MB
The Hawaiian Islands owe their existence to a hot spot in the Earth's mantle located beneath the southeastern part of Hawaii. An outpouring of lava fed by the hot spot built volcanoes that eventually grew above sea level and formed islands. This video segment from Nature shows how the Hawaiian island chain was created.
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Transcript (Rich Text Format Document)
Loading reviews...Teachers' Domain, How to Build an Island from Scratch, published November 18, 2008, retrieved on ,
http://www.teachersdomain.org/resource/nat08.earth.geol.tec.build/
- Background Essay
- Questions for Discussion
- Standards
Print Background EssayVolcanoes form when magma from beneath the Earth’s crust breaks through the surface and erupts. As the erupting lava cools, new islands are created. Every several thousand years, a new island emerges from the sea. It is immediately exposed to winds and rain that erode its surface, but seeds and spores, blown by the wind, become embedded in the newly-formed soil. In a relatively short period of time, the barren rock surface is transformed into a lush tropical island. Today, lava flows from active volcanoes can provide information about underground magma flow, yielding information about potential future eruptions. In spite of scientific advances, however, there is not yet a method for predicting volcanic eruptions with complete accuracy.
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Source: Nature: "Violent Hawaii"
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Major corporate support for the Nature collection was provided by Canon U.S.A. and SC Johnson. Additional support was provided by the Corporation for Public Broadcasting and the nation’s public television stations.