Advanced Science Primary 5 Cycles

Jun Jie wanted to find out if the surface area affects the rate of evaporation. He used two containers, X and Y. Which of the following must he keep the same for a fair test?

A The material of the container
B The size of the container opening
C Both the amount of water and the material of the container
D The amount of water at the start
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Worked Solution

Step 1: Identify the independent variable (surface area). Step 2: Identify constants (amount of water, location, material of container). Step 3: Only the surface area should change.

Correct answer: Both the amount of water and the material of the container

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