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Which option classifies a variable incorrectly?

Answer and explanation

Correct answer: Same water amount as dependent variable

The answer is C because it gives an incorrect classification. A changed temperature is an independent variable: it is the factor deliberately varied. B measured time is a dependent variable: it is the observed result. C says that the same amount of water is dependent, but a factor kept the same is a controlled variable, not a measured outcome; this is the error. D correctly classifies the same container as a controlled variable, because its condition is held constant to make comparisons fair. A, B, and D therefore use the roles correctly. A helpful rule is that ‘same’ usually signals controlled, ‘measured’ signals dependent, and ‘changed’ signals independent. Do not confuse what is held fixed with what is recorded as the result.

Related tags

Incorrect-ClassificationWaterControlled-VariableVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScienceClass 9 Mcq

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