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Class 9 · Science
→Why is writing the hypothesis and analysis plan before an experiment useful?
Class 9 · Science
→In a study two variables increase together but a third factor affects both. What is the third factor called?
Class 9 · Science
→What type of evidence is most suitable for establishing cause and effect in a scientific study?
Class 9 · Science
→In an experiment the control and treatment groups differ only in the treatment. What is the benefit?
Class 9 · Science
→Why is an operational definition created for a scientific concept?
Class 9 · Science
→A scientific conclusion is based on a small sample but applied to the whole country. What does this show?
Class 9 · Science
→A survey included only people who volunteered to participate. What problem may this illustrate?
Class 9 · Science
→What is measurement reliability most closely related to?
Class 9 · Science
→Which question is most closely related to the validity of an experiment?
Class 9 · Science
→What is the correct meaning of scientific consensus?
Class 9 · Science
→If a result appears in only one laboratory and others cannot reproduce it what conclusion is appropriate?
Class 9 · Science
→A scientific claim is supported only by saying that a famous scientist accepted it. What is the main problem?
Class 9 · Science
→In an experiment the person measuring outcomes knows which group received treatment. Which risk increases?
Class 9 · Science
→If a researcher publishes only positive results what problem may arise in scientific literature?
Class 9 · Science
→A chart's vertical axis does not begin at zero and a small difference appears very large. What problem may result?
Class 9 · Science
→A student says that a plant is diseased because its leaves are curled. Which statement is an inference?
Class 9 · Science
→Which is the best way to maintain scientific objectivity?
Class 9 · Science
→A study has a very large sample but it was taken only from one expensive urban school. What is the main problem?
Class 9 · Science
→What is the best test of the usefulness of a scientific model?
Class 9 · Science
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