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Cryosphere
Next we add the cryosphere! Brrrrrr! What's with all that ice and snow! Most ice on Earth is found near the poles as giant icecaps in Greenland and Antarctica, and as icebergs at sea. Ice is also found as glaciers and snow in the mountains, and maybe in your neighborhood in winter. Did you know that when you hold an ice cube in your hand, you are holding a tiny part of the Cryosphere?

Earth's cryosphere has changed in size many times in Earth's past. Right now, most of the world's ice is mostly far to the north or south of us. But in times past, even as recently as 12,000 years ago, Earth's climate was much colder, and huge sheets of ice covered much of North America and Europe during a great " Ice Age." These huge ice sheets left hills, ridges, lakes, and groove marks on rocks all though New England, Wisconsin, Minnesota, and the Dakotas. Yet at the time of the dinosaurs, Earth's climate was much warmer, and all of the ice caps melted and disappeared.

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Spheres
Lithosphere
Hydrosphere
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Spheres | Lithosphere | Hydrosphere | Cryosphere | Biosphere | Atmosphere | Exosphere | Exact Spheres

Diversity | Adaptation | Plate Tectonics | Cycles | Spheres | Biomes | Geologic Time

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April 28, 2005

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