Standard Science Primary 5 Cycles

Siti wants to find out how the surface area of water affects the rate of evaporation. Which variable must she keep the SAME?

A The amount of water at the start.
B The material of the containers.
C The shape of the containers.
D The temperature of the surrounding air.
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Worked Solution

Step 1: Identify the independent variable (Surface Area). Step 2: Identify constant variables (Temperature, Wind, Humidity). Step 3: To ensure a fair test, environmental conditions like air temperature must be identical.

Correct answer: The temperature of the surrounding air.

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