Why do lakes and rivers only freeze on the surface and not all the way through?

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Why do lakes and rivers only freeze on the surface and not all the way through?

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Anonymous 0 Comments

The freeze/ thaw change for water requires transferring enormous amounts of energy and the surface ice acts as an insulator preventing that energy transfer.

That being said some shallow lakes do freeze completely.

A lot of water bodies also end up being used by people who dump relatively warm into them from showers, laundry, dishes, power plants, etc

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