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Class 9 · Science
→While observing a bird's behaviour the observer moved too close and the bird flew away. This is an example of what effect?
Class 9 · Science
→In a weather study a rain gauge was placed under a tree. How might this affect the results?
Class 9 · Science
→An observation states that a glass surface is smooth. What is the best way to make it more scientific?
Class 9 · Science
→A student measured temperature five times but recorded only the middle value. What would be a better scientific record?
Class 9 · Science
→A question asks whether the Moon controls people's behaviour. What is required to make it scientific?
Class 9 · Science
→In which situation would a photograph be the best supplementary evidence for an observation?
Class 9 · Science
→A scientist wrote that an organism's speed suddenly increased. What should be added to make this observation more useful?
Class 9 · Science
→Two groups measured water transparency but one used centimetres and the other millimetres. What is necessary before comparison?
Class 9 · Science
→Which record most improves the reproducibility of a scientific observation?
Class 9 · Science
→While measuring the time of a colour change in a solution the timer was started late. What type of problem is this?
Class 9 · Science
→In a field study only plants near a road were selected. What difficulty arises when drawing conclusions about the entire forest?
Class 9 · Science
→If a material's colour appears different when the light source changes what is the appropriate conclusion?
Class 9 · Science
→What is the main benefit of recording date location and weather during an observation?
Class 9 · Science
→Both air pollution and coughing appeared to increase in an area. Which question is most suitable for investigating a causal link?
Class 9 · Science
→A student recorded temperature as hot cold and normal. What improvement would allow more precise comparison?
Class 9 · Science
→A question asks whether giving more water makes a plant grow better. How should the word better be made scientific?
Class 9 · Science
→Which sentence is the most objective scientific observation?
Class 9 · Science
→One value in an observation table is very different from all the others. What is the most scientific step?
Class 9 · Science
→A student says that rain produced earthworms because they appeared after rainfall. What is the most appropriate scientific criticism?
Class 9 · Science
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