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Which question is better answered by a controlled experiment rather than observation alone?

Answer and explanation

Correct answer: How does the amount of light affect algal growth?

To determine the effect of light it should be changed while other factors remain constant. Choose experiments for causal questions.

Related tags

Controlled ExperimentAlgal GrowthLightScientific Questions And ObservationsExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScienceClass 9 Mcq

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