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Class 9 · Science · Expert
→Two observers described the same event using different words. What should be done to make comparison easier?
Class 9 · Science · Expert
→In which question are the independent and dependent variables most clearly identified?
Class 9 · Science · Expert
→After observing that a metal is shiny it is stated that it will conduct electricity well. What is the second statement?
Class 9 · Science · Expert
→A student already believes organic manure is best and records data only from fast-growing plants. This is an example of which error?
Class 9 · Science · Expert
→In an experiment the number of bubbles was used as an indicator of reaction rate. How can the observation be made more objective?
Class 9 · Science · Expert
→The smallest division of a measuring instrument is five millimetres. A student records a length as twelve point three four centimetres. What is wrong?
Class 9 · Science · Expert
→An observer wrote that a liquid had a strong smell. What is the best way to improve the reliability of this observation?
Class 9 · Science · Expert
→A student counted birds on only one day and drew a conclusion for the whole year. What is the main problem?
Class 9 · Science · Expert
→Which revision best makes a scientific question more precise?
Class 9 · Science · Expert
→Recording an object's colour and measuring its mass are respectively which types of observations?
Class 9 · Science · Expert
→Fish in a pond were seen more often near the surface. What would be the best next observation?
Class 9 · Science · Expert
→If a question can be answered only by opinion which scientific characteristic does it lack?
Class 9 · Science · Expert
→A plant's leaves appeared yellow. Which statement is only an observation and not an inference about the cause?
Class 9 · Science · Expert
→Four students measured the same object's length and obtained slightly different results. What is the most appropriate scientific response?
Class 9 · Science · Expert
→Which question is least suitable for scientific investigation?
Class 9 · Science · Expert
→A student says that the shadow became shorter because the Sun moved higher in the sky. What is the shortening of the shadow?
Class 9 · Science · Expert
→The temperature of a liquid was recorded every two minutes. Which statement is a direct observation?
Class 9 · Science · Expert
→A student observes that two plants kept at the same place grow differently. Which is the most scientific question to investigate the difference?
Class 9 · Science · Easy
→Why is it important to share evidence obtained after testing a hypothesis?
Class 9 · Science · Easy
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