Heat expands and cold constricts - yet when water freezes into ice it expands. How is that possible?
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ANSWERS: 5
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It has to do with the hydrogen. Ice forms in a pattern with gaps in between.
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Anoname I thought gaps might have something to do with it.
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Not always. There are elements where heat constricts and cold expands. It's all to do with the bonds between the atoms breaking/assembling into different formations.
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Anoname
Heat does draw in shrink wrap.
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9-10-2017 Your initial assumption is incorrect. Above 38F warm water floats on cold. Below 38F cold water floats on warm.
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Anoname
Thanks. That's useful info.
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Oxygen enters that's why ice floats
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I think water is one of the few substances where this happens.
mushroom 
jshm22 
Jewels Vern 
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