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Which option lists the independent, dependent, and controlled variables in the correct order when testing the effect of fertilizer amount on plant dry mass?

Answer and explanation

Correct answer: Fertilizer amount, dry mass, water amount

The governing concept is identifying experimental variables by their roles. The independent variable is what the researcher deliberately changes, so it is fertilizer amount. The dependent variable is what is measured in response, so it is plant dry mass. A controlled variable is kept constant; water amount is an appropriate example. Therefore, option B gives the correct order. The other options place these roles in the wrong sequence.

Related tags

VariablesIndependent VariableDependent VariableControlled VariableVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScience

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