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A student investigates the effect of light duration on plant growth. What is the independent variable?

Answer and explanation

Correct answer: Duration of light

The independent variable is the factor deliberately changed by the investigator. In this investigation, the student changes how long the plant receives light, so the duration of light is the independent variable. Plant height is a measured result of growth, so it is the dependent variable. Exam tip: identify the factor the investigator changes to find the independent variable.

Related tags

Independent VariableDependent VariablePlant GrowthLight DurationScientific InvestigationExperimental VariablesScientific Questions And ObservationsExploration: Entering The World Of Secondary Science

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