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

ScienceA student tests the cleaning ability of three soaps, but the initial stain size differs on each cloth. Which would be the fairest dependent variable?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA student tests the effect of soap amount on foam height. The bottle is shaken a different number of times in each trial. What should be done with the number of shakes?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceOne group uses a new study method and another uses the old method but they take different test papers. Which improvement is most appropriate?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIn which situation would percentage change be more useful than comparing final values?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceIf one group is observed in the morning and the other in the evening what problem may arise?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceThe plant type differs between a control group and a treatment group. What is the most likely effect?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceIn which option is the control group selected correctly?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceA student measures reaction rate by recording total time until gas formation stops. If the final gas volume differs each time why may the comparison be unfair?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationHard ScienceThe control group and treatment group had different initial conditions in an experiment. What problem will this create?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationHard ScienceIn which experiment is the effect of amount tested through a proper comparison?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationMedium ScienceIf the initial heights of plants in two groups are very different what problem will arise?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationMedium ScienceWhy is it necessary to keep time intervals equal in an experiment?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationMedium ScienceHow may a large difference in the number of plants in two groups affect the comparison?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationMedium ScienceWhy should seeds of similar size be selected in an experiment?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationEasy ScienceWhat is the role of a controlled variable?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationEasy ScienceA student compared plants under different light levels but the plants had very different initial heights. What is an appropriate improvement?Class 9Exploration: Entering the World of Secondary ScienceScientific questions and observationsHard ScienceWhich question establishes a fair comparison?Class 9Exploration: Entering the World of Secondary ScienceScientific questions and observationsHard ScienceWhat should be the same while comparing two groups?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentEasy ScienceWhat should be kept the same when comparing two plants?Class 9Exploration: Entering the World of Secondary ScienceScientific questions and observationsEasy ScienceWhy is keeping the number of samples equal useful when comparing two groups?Class 9Exploration: Entering the World of Secondary ScienceScientific questions and observationsMedium