Question

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

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

Answer 1

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

Due to the anomalous expansion of water, it will have its maximum density at $4{}^{\circ }\text{C}$ as shown in the graph. Therefore, if the water at the surface is at $2{}^{\circ }\text{C}$, the water at the bottom will have a high density. From the given options expected temperature at the bottom of the lake is $4{}^{\circ }\text{C}$.