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Exploration Entering The World Of Secondary Science

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

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 ScienceA student wrote that sweetened water is good for seeds. How can this be changed into a better hypothesis?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceIn which situation will the validity of an experiment increase the most?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceIn an experiment the amount of water was increased along with temperature. Why did the result become difficult to interpret?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceA student wants to test the effect of temperature on germination. Which would be an appropriate control group?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceWhich of the following hypotheses is the most falsifiable?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceIf an experimental result contradicts the hypothesis what should the scientist do first?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceIn an experiment only one plant was kept in sunlight and one in shade. What is the best way to make the conclusion more reliable?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceWhich statement is the null hypothesis when testing whether fertiliser increases plant height?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceA student predicts that greater light exposure will increase plant growth. Which improvement is most necessary to make this prediction a scientific hypothesis?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpert ScienceWhich statement correctly describes the role of variables in a fair experiment?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceIn an experiment the dependent variable decreases as the independent variable increases. What type of relationship is this?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceIn a filtration experiment which variable becomes uncontrolled if a different cloth is used each time?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceA student uses different amounts of sand and measures filtration time. What are sand amount and filtration time respectively?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceWhy should the initial temperature be kept the same in a food-heating experiment?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceA student heats food for different durations and measures its temperature. Which is the independent variable?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceWhat difficulty would occur if the surface is changed in a spring-and-car experiment?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceA student compresses a spring by different distances and measures the distance travelled by a car. Which is the dependent variable?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceWhy is it necessary to keep the initial water level the same in a water-flow experiment?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceA student measures water flow rate through holes of different sizes. Which is the independent variable?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium