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Class 9 · Science
→If a student investigates whether surface type affects the distance travelled by a rolling ball what is the independent variable?
Class 9 · Science
→If an experimental result is opposite to the hypothesis what is the most scientific action?
Class 9 · Science
→A student investigates whether the amount of soap affects foam height. Which factor should be controlled?
Class 9 · Science
→Which should be the control group when testing the effect of a new fertiliser?
Class 9 · Science
→On what should a good hypothesis be based?
Class 9 · Science
→In an experiment plants received different amounts of water but also different amounts of light. What is the main problem?
Class 9 · Science
→Which hypothesis states a clear cause and effect relationship?
Class 9 · Science
→If the hypothesis states that plant growth will increase with more light what is the independent variable?
Class 9 · Science
→What is the most comprehensive way to check observation quality before drawing a final conclusion?
Class 9 · Science
→In a scientific question light water soil and temperature are all changed at the same time. What is the main difficulty?
Class 9 · Science
→A field observation found more animals in the morning and fewer in the afternoon. What is the best immediate conclusion?
Class 9 · Science
→Two thermometers consistently differ by two degrees in the same liquid. Which step is best for identifying the cause?
Class 9 · Science
→In an observation a student wrote the conclusion first and later selected matching data. What improvement is needed?
Class 9 · Science
→A student observed five cells under a microscope and concluded that all cells in the tissue are the same size. Why is the conclusion weak?
Class 9 · Science
→An investigation asks whether salt changes the boiling of water. Which question is more scientific?
Class 9 · Science
→An organism appeared red to the observer but orange in a photograph. What is the most appropriate step?
Class 9 · Science
→A student recorded sound intensity only as loud or soft. What is the best improvement for comparing different classrooms?
Class 9 · Science
→Which question can be tested most directly through an observational study?
Class 9 · Science
→A student says that two events occurred together so they must be related. Which additional evidence would be most useful?
Class 9 · Science
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