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Class 9 · Science
→A student uses a different amount of salt each time although the question concerns temperature. What has the salt amount become?
Class 9 · Science
→In which question may a correlation be observed but causation cannot be established by observation alone?
Class 9 · Science
→Two observers described the same colour using slightly different words. What can be done to make the observation more standardised?
Class 9 · Science
→If the investigation asks how surface area affects evaporation rate which pair should be kept constant?
Class 9 · Science
→A student concludes that sugar always dissolves faster in hot water after only one trial. What is the main weakness of this conclusion?
Class 9 · Science
→Which record would best support analysis of change over time?
Class 9 · Science
→A student repeatedly measured the height of only one plant. What limitation will remain in the conclusion?
Class 9 · Science
→In which question is the method of measuring the outcome least clear?
Class 9 · Science
→In which situation can sample selection make the result biased?
Class 9 · Science
→What problem may occur if a thermometer reading is recorded immediately after placing it in a hot liquid?
Class 9 · Science
→Which scientific practice can test the reproducibility of an observation?
Class 9 · Science
→In an investigation plant growth was recorded only as good or poor by looking. What is the main limitation of this data?
Class 9 · Science
→If a student uses a different instrument for each measurement what effect may this have on data comparison?
Class 9 · Science
→Which question has been refined best for scientific investigation?
Class 9 · Science
→In an investigation different soil types and different amounts of water were used for every plant. What is the main problem?
Class 9 · Science
→Which option links an observation to a cause without sufficient evidence?
Class 9 · Science
→A measuring cylinder reading is taken from above at an angle. What type of error may occur?
Class 9 · Science
→A student checks the smell of a liquid by bringing it directly close to the nose. What is the main error in this observation?
Class 9 · Science
→In which question would a vague word make scientific measurement difficult?
Class 9 · Science
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