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What is a glacier?
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A glacier is a river of ice that forms in cold regions high up in the mountains or near the poles. It slides very slowly downhill, a few metres each year. It carries a mass of rocks, which scrape away the valley walls and floor. It later deposits rocks and earth in huge ridges called moraines. If a glacier reaches the sea, large pieces break off and float away as icebergs.
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Previous:
Back
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Book:
Best Ever Q&A
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Section:
Our World
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Chapter:
Water
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