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Class 9ScienceExploration: Entering the World of Secondary ScienceScientific questions and observationsMedium
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Which unit is appropriate for an observation of length?

Answer and explanation

Correct answer: Centimetre

A centimetre is a unit used to measure length, so it is the correct option. A litre measures volume, a gram measures mass, and a second measures time; none of these is suitable for observing length. Exam tip: First identify the physical quantity being measured, then choose its appropriate unit.

Related tags

Measurement UnitsLengthCentimetreScientific ObservationClass 9 ScienceScientific Questions And ObservationsExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary Science
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10 more MCQs
  1. 1Which type of question is considered a scientific question?
  2. 2Which of the following is a scientific question?
  3. 3What is the most important feature of a scientific observation?
  4. 4Which statement gives a quantitative observation?
  5. 5Which statement is a qualitative observation?
  6. 6A student asks how water temperature affects the rate at which sugar dissolves. Which factor is changed?
  7. 7What is the most important feature of a scientific question?
  8. 8A student asks how the amount of light affects plant growth. What should be changed to investigate this question?
  9. 9Which statement would be considered a direct observation?
  10. 10Which question is most suitable for scientific investigation?
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