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What is the independent variable when testing the effect of container surface area on evaporation?

Answer and explanation

Correct answer: Surface area of the container

The surface area of the container is deliberately changed in this experiment, so it is the independent variable. The amount of water evaporated is the dependent variable because it is measured as the outcome. Factors such as the initial water volume and room temperature should be kept constant so that the result shows only the effect of surface area. Exam tip: the factor deliberately changed by the experimenter is the independent variable.

Related tags

Independent VariableDependent VariableControlled VariablesEvaporationSurface AreaExperimental DesignVariables In An ExperimentExploration: Entering The World Of Secondary Science

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