Why do lakes freeze form water top towards bottom?

Explain : (i) Why water has higher boiling melting points as compared to H_2 S ? (ii) Why do lakes freeze from top towards bottom ?

Why do lakes freeze from top towards bottom ?

Why do lakes freeze from top towards bottom ?

Given reasons (i) Lakes freeze form top towards bottom. (ii) Ice floats on water.

Given reasons (i) Lakes freeze form top towards bottom. (ii) Ice floats on water.

Why do lakes freeze first at the surface.

Why do lakes freeze first at the surface ?