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Pulse Rate

Class 9 Science के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

SciencePulse rate is measured after exercise in two groups. One group runs for five minutes and the other cycles for ten minutes. What is the biggest flaw in this design?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceWhat is the main advantage of recording the initial resting pulse rate while testing the effect of exercise duration on pulse rate?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIn an experiment on exercise and pulse rate what additional variable may affect the result if different students are used?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceA student measures pulse rate after exercising for different durations. Which is the dependent variable?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceIf exercise duration is changed and pulse rate is measured, what type of variable is pulse rate?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceWhich experimental plan would most reliably test whether exercise increases pulse rate?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceA hypothesis states that more exercise increases pulse rate. Which experimental plan is the fairest?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationHard ScienceWhat would be an appropriate control in an experiment on exercise and pulse rate?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationMedium ScienceIf a student tests the hypothesis that exercise increases pulse rate what should be measured?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationMedium ScienceA hypothesis states that more exercise will increase pulse rate. What should be measured in the experiment?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationEasy