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Plants are grown in four soil types but each soil receives a different amount of water. What should be done to isolate the effect of soil type?

Answer and explanation

Correct answer: Give all plants the same amount of water

Water amount can affect growth so it should be identical for all groups. This keeps soil type as the only manipulated factor.

Related tags

VariablesSoil TypeWaterControlled VariableVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScience

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