MYP Physics · 01 · multiple choice
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Scientific inquiry and measurement · Original GioPhysics question with a detailed, mark-by-mark answer guide.
- Demand
- recall
- Marks
- 3
- Topics
- 2
- Answer
- Complete
Four students measure the width of a notebook with a ruler whose smallest division is 1 mm. Which reported result is the most appropriate?
- a
Select and explain Select the best result, then explain why the other highly precise-looking result is not justified by the ruler.
3 marks
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a
Select and explain Select the best result, then explain why the other highly precise-looking result is not justified by the ruler.
Predict from the governing principle before looking for a matching option. Then reject alternatives by checking direction, units, limiting behaviour or the physical meaning of each statement.
- 1
Selects option C, which reports the notebook width as 21.4 cm.
- 2
Recognises that a 1 mm scale supports reporting to about the nearest millimetre, or 0.1 cm.
- 3
Explains that 21.437 cm claims digits that the instrument cannot resolve.
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