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What is the purpose of calibration in an experiment?

Answer and explanation

Correct answer: To check an instrument reading against a known value

The direct answer is A: calibration checks an instrument reading against a known value. Calibration means comparing a measuring instrument with a trusted reference, such as checking a thermometer against a known temperature or a balance with a standard mass. Step by step, use the reference, read the instrument, compare the two values, and adjust, label or replace the instrument if necessary. Option A is correct because calibration tests measurement accuracy and helps reveal systematic error. Option B is wrong because calibration cannot make a hypothesis true; evidence must decide whether a hypothesis is supported. Option C is wrong because calibration does not determine or reduce the number of samples. Option D is wrong because calibration does not remove the control group; the control group serves a separate experimental purpose. Calibration improves confidence in measurements but does not guarantee that every experiment is perfect. Memory cue: calibrate means compare with a known standard.

Related tags

CalibrationInstrument-AccuracyMeasurementExperimentHypothesis And ExperimentationExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScience

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