Standard Science Primary 5 Cycles

Jun Jie placed two identical glasses of water, A and B, in different locations. After 2 hours, he noticed more water droplets on the outer surface of Glass A. Which of the following explains this?

A Glass A was in a warmer place than Glass B.
B The air around Glass A was drier than Glass B.
C Glass A had a larger surface area than Glass B.
D Glass A contained colder water than Glass B.
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Worked Solution

Step 1: Water droplets on the outside of a glass are formed by condensation. Step 2: Condensation occurs when warmer water vapor in the air touches a cooler surface and loses heat. Step 3: A colder glass (A) will cause more condensation than a less cold glass (B).

Correct answer: Glass A contained colder water than Glass B.

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