Why do lakes freeze from the top down rather than the bottom u | Today I Learn
Why do lakes freeze from the top down rather than the bottom up?
The reason why ice forms on the top of lakes and ponds is that once water cools below 39 degrees Fahrenheit, it becomes lighter and less dense the more it cools.
This means that water expands as it freezes into ice.
As a result, ice takes up more room than the water it was made from.
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