G3.3 Interpret scales on a range of measuring instruments and recognise the inaccuracy of measurements.
Candidates should be able to:
interpret scales on a range of measuring instruments including those for time, temperature and mass, reading from the scale or marking a point on a scale to show a stated value
know that measurements using real numbers depend on the choice of unit
recognise that measurements given to the nearest whole unit may be inaccurate by up to one half in either direction
Example
Given a scale with a maximum measurement of 2 kg, explain how 5 kg could be weighed out using the scale.