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Class 9 · Science · Expert
→A student's conclusion is based only on the mean although individual measurements vary widely. What additional information is most needed?
Class 9 · Science · Expert
→Under which circumstance is it scientifically appropriate to revise a hypothesis?
Class 9 · Science · Expert
→Which principle is most appropriate when planning an experiment involving living organisms?
Class 9 · Science · Expert
→Why is following safety rules an essential part of hypothesis testing in a laboratory?
Class 9 · Science · Expert
→If increasing the sample size leaves the mean result nearly unchanged but reduces uncertainty what is the most appropriate interpretation?
Class 9 · Science · Expert
→A survey asked whether respondents agree that beneficial exercise should be done daily. Why is this question weak?
Class 9 · Science · Expert
→While measuring plant growth the student sometimes measured to the highest leaf and sometimes to the top of the stem. What problem occurred?
Class 9 · Science · Expert
→Two different hypotheses predict the same result. What type of experiment is needed to distinguish between them?
Class 9 · Science · Expert
→A student rewrote the aim after the experiment when the expected trend was absent. Why is this practice scientifically weak?
Class 9 · Science · Expert
→A student hypothesises that a longer pendulum takes more time. Which prediction follows logically from this hypothesis?
Class 9 · Science · Expert
→When testing the effect of light what type of decision is giving the same amount of water to all groups?
Class 9 · Science · Expert
→Repeated experimental results are very similar to one another but far from the true value. What can be said about the measurements?
Class 9 · Science · Expert
→In which situation would external validity be most limited?
Class 9 · Science · Expert
→What is the main problem if an experimental outcome is measured only using words such as good or bad?
Class 9 · Science · Expert
→For what purpose is a positive control used?
Class 9 · Science · Expert
→Why is a negative control used when testing a hypothesis?
Class 9 · Science · Expert
→A conclusion states that the results prove the hypothesis. Which is better scientific wording?
Class 9 · Science · Expert
→The student recording results wrote only measurements that agreed with the hypothesis. What type of bias is this?
Class 9 · Science · Expert
→Which experimental design would best test a dose-response relationship?
Class 9 · Science · Expert
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