LYCOS RETRIEVER 
Earth: Continents
built 290 days ago
Convection and the release of heat from the Earth's core drives further convection in the mantle. Convection in the mantle drives plate tectonic motions of the sea floor and continents. It is possible to use P waves and S waves traveling through the mantle from earthquakes to map out this convection, much like a hospital CAT scan can map out bones and organs with x-rays.
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The temperature on Earth ranges from between -127°F to 136°F (-88°C to 58°C; 185 K to 311 K). The coldest recorded temperature was on the continent of Antarctica (Vostok in July, 1983). The hottest recorded temperature was on the continent of Africa (Libya in September, 1922).
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This image of Antarctica was taken by Galileo several hours after it flew close to the Earth on December 8, 1990. This is the first picture of the whole Antarctic continent taken nearly at once from space. Galileo was about 200,000 kilometers (125,000 miles) from Earth when the pictures were taken.
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