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Which factor should be kept the same in a fair comparison of cloth drying?

Answer and explanation

Correct answer: Size of the cloth and its initial wetness

In a fair comparison, only one factor, such as sunlight or shade, should be changed. Keeping the cloth size and initial wetness the same means that any difference in drying time can be attributed to the light condition. Drying time is the measured outcome, not a controlled variable, and a prediction is not an experimental variable. Exam tip: Factors kept unchanged are called controlled variables.

Related tags

Controlled VariablesFair TestExperimental VariablesCloth DryingScientific InvestigationVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary Science

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