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What¡¯s Below the Tip of the Iceberg? Icebergs are mostly underwater because ice is less dense than seawater. About 1/9 of an iceberg is above the surface, and the rest remains hidden. Icebergs form when glaciers, made of compressed fresh water, break off into the sea. This process can take thousands of years. Once in the ocean, icebergs float for 3–6 years, carried by currents. They melt, crash into land, or break apart, making strange sounds like "Bergie Seltzer" when trapped air bubbles burst. Icebergs vary in size, from... |
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