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Class 9 · Science
→A student concluded that more water makes plants grow faster after observing for only two days. What is the main problem?
Class 9 · Science
→In which situation would a control group be most necessary?
Class 9 · Science
→In an experiment three values are close to one another but all are far from the accepted value. What does this situation indicate?
Class 9 · Science
→A student investigates the relationship between light intensity and the rate of photosynthesis. What could be a suitable indicator of photosynthesis rate?
Class 9 · Science
→Which observation would be considered the most objective?
Class 9 · Science
→If all measurements in an experiment are consistently higher than the true value what type of error does this suggest?
Class 9 · Science
→A plant grew by approximately two centimetres per day. What type of statement is this?
Class 9 · Science
→Which question requires the greatest revision to become suitable for scientific investigation?
Class 9 · Science
→A student placed a thermometer in hot water and recorded the value immediately. What should have been done for a more reliable observation?
Class 9 · Science
→Three groups of seeds were kept at different temperatures but each group contained only one seed. What is the best way to increase the reliability of the conclusion?
Class 9 · Science
→A scientist recorded only the data that supported the expected idea. This is an example of which problem?
Class 9 · Science
→Which option includes both a qualitative and a quantitative observation?
Class 9 · Science
→A student asks how surface area affects the rate of evaporation. Which factor is most essential to keep the same for a fair test?
Class 9 · Science
→Which statement gives a conclusion rather than an observation?
Class 9 · Science
→In an experiment plants received different amounts of fertiliser but each plant also received a different amount of water. What is the main weakness of this investigation?
Class 9 · Science
→A student measured three times and obtained values of twelve point one centimetres twelve point two centimetres and twelve point one centimetres. What do these values mainly indicate?
Class 9 · Science
→Which scientific question states both the independent and dependent variables most clearly?
Class 9 · Science
→A student investigates whether soil acidity affects seed germination. Which is the most appropriate dependent variable?
Class 9 · Science
→A 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 9 · Science
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