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In which experiment is the independent variable most clearly identified?

Answer and explanation

Correct answer: Measuring the time taken for sugar to dissolve at different temperatures

In option A, temperature is deliberately changed and the time taken for sugar to dissolve is measured. Therefore, temperature is the independent variable, while dissolving time is the dependent variable. In option B, only plant height is observed; no factor being changed is clearly stated. Exam tip: The factor deliberately changed by the investigator is the independent variable.

Related tags

Independent VariableScientific MethodExperimentationTemperatureDissolvingDependent VariableHypothesis And ExperimentationExploration: Entering The World Of Secondary Science

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