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provides lessons for studying Antarctica and the Arctic, and topics related to them. Learn about ecosystems, ice sheets, global warming, earth as a system, and earth's albedo (diffusely reflected light from the sun). Find out about satellites orbiting earth, how the poles compare, Inuit observations of climate change, and tracking polar bears. (Teachers' Domain, Multiple Agencies)
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Each winter, the ice apron that surrounds the continent of Antarctica expands from its summertime area of about 4 million square kilometers (1.5 million square miles) to 20 million square kilometers (7.5 million square miles). Although its presence has proven treacherous for would-be explorers and commercial shippers, sea ice provides essential hunting, feeding, and breeding habitats to polar bears, seals, and penguins. |
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Discovering Antarctica |
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