if heat rises, why do bodies of water freeze from the top down?

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If I had to guess, it’s because the temperature above the water is constantly colder than the water itself – but that is what I actually don’t understand.

If the surface temperate is extremely colder than the temperature of the water itself, wouldn’t the cold “sink” that much faster, making the warm water “rise” at an equivalent rate, and thus forcing more of the cold water to the bottom?

Maybe a better post for stupid questions, but I’m very curious what causes this – perhaps this just applies to air, and not water? And if that’s the case, then also why?

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Anonymous 0 Comments

Water Molecules form small triangles which can slide over each other when a liquid, but when it goes solid, the 3 triangles form a hexagon with a gap in the center so it takes up more space than it would when liquid, make it less dense so it floats. If water didn’t do this, a lot of life would not exist.

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