Standard Science Primary 5 Cycles

Siti wanted to find out if the surface area of water affects the rate of evaporation. She used two containers, P and Q, with different openings. Which of the following must she keep the same for a fair test?

A The surface area of the water
B The amount of water in each container
C The shape of the containers
D The material of the containers
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Worked Solution

Step 1: Identify the aim (test surface area). Step 2: Surface area is the changed variable. Step 3: All other variables, like the initial volume of water and location, must be kept constant.

Correct answer: The amount of water in each container

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