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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।

ScienceIf a controlled variable gradually changes during an experiment what type of error may appear in the results?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA survey asked whether respondents agree that beneficial exercise should be done daily. Why is this question weak?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceWhy is writing the hypothesis before starting the experiment more scientific?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceWhich sampling method would give the least biased conclusion about the sleeping habits of all students in a school?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceIn a medicine trial neither the participants nor the person recording outcomes knows who received the real medicine. What is this arrangement called?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceWhy is it important to decide how the outcome will be measured before conducting an experiment?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceWhat is the main purpose of randomly assigning participants to groups in a fair test of a medicine?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceIn an experiment students were allowed to choose their treatment group. What problem may result?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceWhat is the most appropriate action when an outlier appears in an experiment?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceIn which experiment would random sample selection be most useful?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceWhat is the main benefit of using measurement intervals decided before an experiment?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationHard ScienceWhat is the main benefit of randomly assigning samples to groups in an experiment?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationHard ScienceSeed germination was tested in two groups. One group had twenty seeds and the other had only two. What is the main weakness of the conclusion?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationHard ScienceIn a trial students know whether they received the real energy drink or an ordinary drink. Which effect may result?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationHard ScienceIn which experiment would a double-blind method be most useful?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationHard ScienceWhy is random sampling useful in an experiment?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationHard ScienceA thermometer reads two degrees above the true temperature every time. What type of error is this?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationHard 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 ScienceWhile observing a bird's behaviour the observer moved too close and the bird flew away. This is an example of what effect?Class 9Exploration: Entering the World of Secondary ScienceScientific questions and observationsExpert ScienceA student counted birds on only one day and drew a conclusion for the whole year. What is the main problem?Class 9Exploration: Entering the World of Secondary ScienceScientific questions and observationsExpert