Polar ice caps exist on other planets. This is Mars' northern polar ice cap, called the Planum Boreum. The deep canyon on the right is called the Chasma Boreale, and is about the same size as the Grand Canyon in Arizona.

Photograph courtesy NASA/Caltech/JPL/E. DeJong/J. Craig/M. Stetson

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ice cap
ice cap Encyclopedic Entry

Best For
5-12+

Subjects
Geography, Science

Appropriate For

  • Educators
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  • Students

Encyclopedic entry. An ice cap is a thick layer of ice and snow that covers large areas of land. You’ll usually find ice caps in the North and South Poles of the Earth.