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What is the independent variable while testing the effect of stirring speed on salt dissolving?

Answer and explanation

Correct answer: Stirring speed

The independent variable is the factor deliberately changed by the experimenter. In this investigation, the stirring speed is changed, and its effect on the time taken by salt to dissolve or on the rate of dissolving is observed. Therefore, stirring speed is the independent variable. Factors such as the amount of salt and water temperature should be kept constant because they can also affect the result. Exam tip: the factor that is changed is the independent variable.

Related tags

Independent VariableControlled VariablesScientific ExperimentStirring SpeedSalt DissolvingClass 9 ScienceVariables In An ExperimentExploration: Entering The World Of Secondary Science

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