A thermometer is removed from a beaker of boiling water and placed in a beaker of room temperature water. The thermometer takes 15 seconds to reach a reading of 25°C. The same thermometer is returned to the boiling water for several minutes. It is then placed under a tap of running water at room temperature. The thermometer takes only 10 seconds to reach a reading of 25°C. What conclusion could you make about conduction and convection based on these observations?

Your

Conduction is a more efficient method of heat transfer.

Convection is a more efficient method of heat transfer.

No valid conclusion is suggested by these observations.

Conduction and convection are equally efficient methods of heat transfer.