Question

The temperature of water at the bottom of a lake whose upper surface has frozen to ice would be around

Answer 1

It would be 4°C . Hope it will help u.

Answer 2

Water achieves its maximum density at roughly 4°C. That is, water (including ice) at all other temperatures below or above 4°C is less dense. Since matter is ordered from top to bottom by increasing density, any 4°C water in a lake will be found at the bottom.