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In which question is water temperature the independent variable?

Answer and explanation

Correct answer: How does water temperature affect the time taken for salt to dissolve?

An independent variable is the factor that the experimenter deliberately changes. In option A, the water temperature is changed and the time taken for salt to dissolve is measured, so water temperature is the independent variable. In options B, C and D, the independent variables are the amount of salt, amount of water and stirring speed respectively. Exam tip: In a question asking “How does X affect Y?”, X is usually the independent variable.

Related tags

Independent VariableExperimental VariablesWater TemperatureSalt DissolutionScientific InvestigationVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary Science

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