CBSE Class 9 Science
Question 25 of 26
Matter in Our Surroundings — Question 4
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Question Question 4
Why are we able to sip hot tea or milk faster from a saucer rather than a cup?
Evaporation is a surface phenomenon. If the surface area is increased, the rate of evaporation increases. The surface area of a saucer is more than a cup, hence rate of evaporation is greater in a saucer than in a cup. As evaporation causes cooling, so hot tea or milk gets cooled quickly in a saucer than in a cup enabling us to sip it faster.