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Class 9 · Science
→If the expected result is obtained in only one trial how should the scientific conclusion be stated?
Class 9 · Science
→Why is it useful to create an operational definition before an experiment?
Class 9 · Science
→An experiment uses five levels of the independent variable. What is the main advantage?
Class 9 · Science
→In a photosynthesis experiment sodium hydrogen carbonate is added to increase carbon dioxide availability. Why should its amount be kept constant when testing light intensity?
Class 9 · Science
→A student's experiment supports a hypothesis but the same experiment gives a different result at another school. What does this indicate?
Class 9 · Science
→Which question can most easily be converted into an experimental hypothesis?
Class 9 · Science
→The mean result increased in support of a hypothesis but the data had a very large spread. What is the most appropriate interpretation?
Class 9 · Science
→In an experiment students were allowed to choose their treatment group. What problem may result?
Class 9 · Science
→In which statement is the difference between a hypothesis and a prediction correctly described?
Class 9 · Science
→If the hypothesis is that frictional force increases with surface roughness which graph result would support it?
Class 9 · Science
→A student hypothesizes that leaf area affects transpiration. Which plan is most appropriate?
Class 9 · Science
→Which experiment most clearly uses a positive control?
Class 9 · Science
→What is the most appropriate action when an outlier appears in an experiment?
Class 9 · Science
→A student concludes that a new drink improves memory because the treatment group had a higher mean score. Which information is most necessary to evaluate the conclusion?
Class 9 · Science
→An experiment gives results of (12.1) cm (12.0) cm and (12.2) cm while the true value is (15.0) cm. How should these measurements be described?
Class 9 · Science
→Which option would most improve the precision of measurement?
Class 9 · Science
→If every group in an experiment receives a different amount of water and a different amount of fertilizer what is the main problem?
Class 9 · Science
→Which hypothesis can be shown false by an experiment?
Class 9 · Science
→The hypothesis is that a higher acid concentration makes a reaction faster. Which measurement is most suitable as the dependent variable?
Class 9 · Science
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