Standard Science Primary 5 Cycles

Ravi placed an equal amount of water in two different containers, P and Q. After 3 hours in the sun, Container Q had less water left. Why?

A Container Q has a smaller exposed surface area.
B The water in Container P was hotter.
C Container Q has a larger exposed surface area.
D Container P was in a windier spot.
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Worked Solution

Step 1: Less water left means faster evaporation. Step 2: Evaporation rate increases with a larger exposed surface area. Step 3: Therefore, Q must have a larger surface area than P.

Correct answer: Container Q has a larger exposed surface area.

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