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Most substances become more dense as their temperatures decrease. The bonds between each atom gets close and stronger, thus harder to break apart.

However, water has a special property that, at 4 degrees Celsius, the atoms are the most dense. As water gets colder, the atoms get further apart, so when water is 0 degrees Celsius (Freezing point) then the atoms are less dense than water at 4 degrees Celsius. When a substance is less dense than the liquid it`s placed in, it would float. That`s why ice water would float on water.

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12y ago
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12y ago

Ice is water - just frozen as you know. It has the same chemical composition as water - 2 Hydrogen atoms and 1 Oxygen atom. Ice is basically Bouyancy neutral in water, but because it expands upon freezing, the resultant density of the ice is slightly less than that of the surrounding liquid and it floats.

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14y ago

The reason why ice floats on water is due to the anomalous behavior of water. Water, when cooled beyond 4oc, expands instead of contracting like other normal liquids. Due to this, the density of ice is less than that of water and it is able to float on water.

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12y ago

When water is cooled below 4 degree celsius,it starts to expand hence inreases in volume.this will cause the density of ice to reduce hence can float on liquid water.

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Q: Liquids are generally denser than solids but why ice floats on water as it is a solid?
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