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A student tests the effect of soil type on plant growth. What is the independent variable?

Answer and explanation

Correct answer: Type of soil

An independent variable is the factor deliberately changed by the experimenter. Here, the student uses different types of soil, so soil type is the independent variable. Plant growth or plant height is a measured outcome, so it is a dependent variable. Exam tip: identify the factor that is changed deliberately.

Related tags

Independent VariableDependent VariablePlant GrowthSoil TypeExperimental VariablesVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary Science

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