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Confounding Variable

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

ScienceIf the amount of water changes unintentionally along with the independent variable what is the most likely effect?Class 9Exploration: Entering the World of Secondary ScienceScientific questions and observationsExpertScienceA student concluded that more light increases plant growth but the dark group had a smaller initial size. What should be done to improve the conclusion?Class 9Exploration: Entering the World of Secondary ScienceScientific questions and observationsHardScienceA student experimented on three plants but planted each in a different type of soil. Why would the conclusion about fertiliser be doubtful?Class 9Exploration: Entering the World of Secondary ScienceScientific questions and observationsHardScienceIf a control group did not receive the treatment but received more attention which factor may affect the outcome?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceExpertScienceIn an experiment the treatment group received both a new teaching method and extra study time while the control group received neither. What is the main obstacle to interpretation?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceExpertScienceA researcher observed that students with more books also had higher marks. Which conclusion is scientifically most cautious?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceExpertScienceIn a study two variables increase together but a third factor affects both. What is the third factor called?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceHardScienceA student concluded that fertiliser makes plants grow faster but also gave more water to fertilised plants. What is the main weakness of the conclusion?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceHardScienceIn an experiment the amount of light was changed and plant growth was measured. The amount of water also varied. What is the main problem?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceHard

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