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What will the experiment be like if both water amount and light are changed?

Answer and explanation

Correct answer: Not fair

Direct answer: Option B is correct. A fair test changes one independent variable and keeps other important conditions constant. In this situation both water amount and light are changed, so two possible causes of the result are mixed together. We cannot confidently decide whether water, light, or their combination produced the observed effect. Option A is wrong because changing two factors does not make an experiment more accurate; it generally weakens the comparison. Option B works because the test is not fair: it does not isolate one cause. Option C is wrong because a fully controlled experiment keeps relevant conditions constant, apart from the one factor deliberately tested. Option D is wrong because the experiment clearly has variables—water and light are being changed, and some outcome is measured. A useful memory line is: if two test conditions change at once, the experiment loses a fair comparison.

Related tags

Unfair-TestMultiple-VariablesWaterLightVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScience

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