Standard Science Primary 5 Cycles

Siti poured 50ml of water into two different containers, A and B, and placed them in the sun. After 2 hours, which setup will have less water left?

A Both will have the same amount of water left.
B Setup B, because it has a smaller exposed surface area.
C Setup A, because the water is closer to the sun.
D Setup A, because it has a larger exposed surface area.
Show Worked Solution

Worked Solution

Step 1: Identify the variable being tested: Exposed surface area. Step 2: Setup A is a wide bowl, giving it a larger exposed surface area than the narrow glass in Setup B. Step 3: A larger exposed surface area increases the rate of evaporation. Step 4: Therefore, Setup A will lose more water to evaporation.

Correct answer: Setup A, because it has a larger exposed surface area.

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