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Class 9 · Science
→Fish abundance in a pond was estimated by observing only near the shore. What is the main sampling problem?
Class 9 · Science
→A student counted ten black spots on a leaf and concluded that the plant had a fungal infection. Which statement is an inference?
Class 9 · Science
→A scientific question asks how pollution affects health. What should be done to make it investigable at school level?
Class 9 · Science
→Two observers give different names to the colour of the same sample. Which improvement would standardise the observation most effectively?
Class 9 · Science
→A student wrote that a solution changed colour very quickly but did not measure time. What type of data is missing?
Class 9 · Science
→A research question asks which water is better for plants. What is the best way to make it scientifically clear?
Class 9 · Science
→Observers in a bird study record notes only in the morning. What is the main limitation of drawing conclusions about behaviour throughout the day?
Class 9 · Science
→A student observed that leaves of plants placed at different heights had different temperatures. Which question would most clearly test a causal relationship?
Class 9 · Science
→Which sequence is most appropriate for moving from a scientific question to a conclusion?
Class 9 · Science
→A scientist found a difference between the averages of two groups but values within both groups were widely spread. What should be examined before concluding?
Class 9 · Science
→Which option sets an appropriate observation frequency?
Class 9 · Science
→A student concluded that red light is best for all plants after testing only one species. What is wrong with the conclusion?
Class 9 · Science
→Different groups recorded length using different units in an investigation. What should be done before comparison?
Class 9 · Science
→Which observation may provide the strongest direct evidence of a chemical change?
Class 9 · Science
→A student wrote that a plant grew rapidly. What is the best way to make this statement more scientific?
Class 9 · Science
→Which record would allow another student to repeat the experiment most easily?
Class 9 · Science
→One result in an experiment is very different from all the other values. What is the most scientific action?
Class 9 · Science
→Which option states a hypothesis most appropriately?
Class 9 · Science
→In a field study only plants near a road were included in the sample. What problem may arise?
Class 9 · Science
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