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A hypothesis states that more exercise will increase pulse rate. What should be measured in the experiment?

Answer and explanation

Correct answer: Number of pulse beats per minute

Direct answer: C, the number of pulse beats per minute. The hypothesis predicts that exercise changes pulse rate, so pulse rate is the dependent variable: the result that is measured. Step by step: measure the resting pulse, give different or defined amounts of exercise, count beats for one minute, and compare the values. C directly tests the prediction. A is identifying information, not the outcome. B is unrelated to pulse rate. D is also unrelated and cannot show the effect of exercise. The exercise amount is the factor changed, while pulse beats per minute are measured. Memory cue: measure the result named in the hypothesis.

Related tags

Pulse RateExerciseDependent VariableHypothesis And ExperimentationExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScienceClass 9 Mcq

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