Yami pours powdered cocoa mix into milk and stirs it. Then she microwaves the mixture for three minutes. When she takes the cup out, the handle is very warm. Steam rises from the cup, so she blows it before taking a sip. In which part of this scenario can convection be best observed?
Answer
A
stirring powdered cocoa mix into milk
B
touching the warm handle of the cup
C
rising steam from the cup of cocoa
D
pouring the cocoa mix into the milk
Explanation
Convection transfers heat through the movement of a fluid, such as air or water. The steam rising from the hot cocoa is warm water vapor moving upward, making it the clearest example of convection. The warm handle is mainly an example of heat transfer by conduction.
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