Tip of the Iceberg

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If all the ice floating in the ocean was to melt, the sea level would not rise. Try it. Fill a glass with ice, then top it with water to the brim. Then wait for the ice to melt and observe the water level. Only 2% of Earth's ice is floating in the ocean.
See Also: http://www.johnstonsarchive.net/environment/waterworld.html

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