Question

The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason upsc

Answer 1

because earth has always have high temperature and in winter our atmosphere is cold so, it is confirm that water frezes on the top but not deep in the wate

Answer 2

Water attains maximum density at 4 degrees Centigrade.

When water at some temperature higher than this is cooled from above, the cold water at the top settles to the bottom, letting warmer water get cooled. Once the temperature hits 4 degrees, though, this changes. The cold water stays on top and selectively gets cooled, until it forms ice. Now, this ice is a really good insulator of heat, so it ‘protects’ the warmer water under it from freezing.

The layer thickness of ice would vary, though, based on atmospheric temperature.

If that helps mark my answer brainliest!!!