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Class 9 Mcq

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

ScienceA scientific conclusion claims an effect applies to all humans although the study involved only healthy adults. What problem does this illustrate?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceA result was obtained in several independent laboratories but all used the same faulty instrument model. What caution is necessary?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceIf an experimental conclusion is based on a difference smaller than the instrument's least measurable division what is the main problem?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceA model makes very accurate predictions but its internal process may differ from the real system. Which conclusion is appropriate?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceOnly the treatment group showed improvement in a study of an intervention. Why is the conclusion weak without a control group?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceAgreement about a scientific claim is growing but some experts disagree. Which conclusion is appropriate?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceNot every possible influencing factor can be controlled in an experiment. What should the scientist do?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceWhy does confidence increase when a scientific claim is supported by several independent types of evidence rather than one type alone?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceIf an observer knows the expected result and records ambiguous measurements in that direction what is this?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceWhy should a scientific report describe the method in enough detail for another researcher to repeat it?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceA researcher performed many possible analyses and published only the most impressive result. What is the main problem?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceIf two groups have the same average but one has much more spread what would be missed by looking only at the average?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceWhy do random sampling and random assignment serve different purposes in an experiment?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceAn experiment was designed to test causation but participants chose their own groups. What is the main risk?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceResults were obtained only in a tightly controlled laboratory. The possibility that they may not occur in real life relates to which limitation?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceA survey question is worded so that one answer appears more reasonable. Which bias may mainly arise?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceThe same result was obtained repeatedly by the same experimenter but not by other groups. Which quality is present while another is doubtful?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceA study measured treatment benefit only through self-reported feelings. What addition would most strengthen the conclusion?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceTwo versions of a scientific model explain the same data. Why may the version with fewer unnecessary assumptions be preferred?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1ExpertScienceWhat problem arises if a new untested assumption is added after every opposing result to protect a hypothesis?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceLevel 1Expert

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