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What is the main purpose of a controlled variable?

Answer and explanation

Correct answer: To make the experiment fair

Controlled variables are factors that are kept the same throughout an experiment. This ensures that any change in the result can be linked only to the independent variable, making the test fair. If all factors are changed, it is impossible to identify which factor caused the change. Exam tip: the independent variable is changed, controlled variables are kept constant, and the dependent variable is measured.

Related tags

Controlled VariablesFair TestExperimental VariablesIndependent VariableDependent VariableScience ExperimentVariables In An ExperimentExploration: Entering The World Of Secondary Science

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