when water freezes, its volume reduces, true or false?
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Answer:
true
Explanation:
Yes, this is true. Water expands when it freezes, and since density is equal to mass/volume, an increase in volume would decrease density.
This is a strange property to have. Usually a solid is more dense than a liquid, but water behaves differently. Water having this unusual intrinsic property is absolutely paramount to sustaining life on Earth. Just think, if ice sank when it froze, there would essentially be a cyclical insulation, where the top layer would freeze, sink, and then be replaced by a liquid layer, only to freeze again and restart the process.
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