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Learn why ice floats on water and how to make it sink

Educational Area: Science / Technology / Engineering

Everyone loves a discrepant event! Students are surprised when ice does not always float in a clear liquid that looks like water. Why does ice float in the first place? Water expands as it freezes and the molecules are farther apart, or less dense. Water’s density is 1.0 and the density of ice is .92. The molecules in the water, since they are closer together, actually hold up the ice so it will float.


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