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What problem may arise if plant height is measured at different times each day?

Answer and explanation

Correct answer: Data comparison will be less reliable

Factors such as light, temperature and the plant’s water status can vary at different times of the day. This may introduce unwanted variation in measurements, making comparisons between days less reliable. The ruler does not change size; the issue is changing measurement conditions. Exam tip: For a fair comparison, measure plant height at the same time each day using the same method.

Related tags

Plant GrowthMeasurement ReliabilityControlled VariablesScientific InvestigationData ComparisonVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary Science

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