Question

The temperature of water at the surface of a deep lake is $2^{\circ }\text{C}$. The temperature expected at the bottom is _____.

• A. $0^{\circ }\text{C}$
• B. $2^{\circ }\text{C}$
• C. $4^{\circ }\text{C}$
• D. $6^{\circ }\text{C}$

Answer 1

The correct option is C $4^{\circ }\text{C}$

Assuming that the lake is deep enough, we should expect a density and temperature distribution such that the densest water settles at the bottom. That layer of water would be at $4^{\circ }\text{C}$, as water is densest at that temperature.