Coastal & Marine Geology InfoBank

USGS CMG InfoBank: Water is Needed for Life


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Comment: 18:13 - 18:44 (00:31)

Source: Annenberg/CPB Resources - Earth Revealed - 2. The Restless Planet

Keywords: life, ocean, atmosphere, "solar radiation"

Our transcription: An ocean may also explain the presence of life on Earth, for liquid water is an essential ingredient of biological reactions.

The oceans played a further role in nurturing life, however, for Earth's early atmosphere was probably full of deadly solar radiation.

Water would have screened out such radiation enabling the fragile process of life's origin and early development to take place.

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Accessibility FOIA Privacy Policies and Notices
U.S. Department of the Interior \| U.S. Geological Survey URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/moviepage/02.01.29.html Page Contact: InfoBank staff Page Last Modified: Tue Dec 16 06:29:34 PST 2008 (wcs)