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WorksheetsResolution & Estimating Uncertainty
Total questions: 10
Worksheet time: 5mins
What is meant by resolution?
The interval within which the true value
of a quantity can be expected to lie.
For a measuring instrument, the smallest change
in a quantity that gives a change in the reading that can be seen.
A measurement result which is judged
to be close to the true value.
Measurements which there is very little spread about the mean value.
What is the resolution of the balance the student used to measure mass of nail ?
1 × 10−3 g
1 × 10−2 g
1 × 10−1 g
1 × 102 g
The teacher used a temperature sensor to
measure the temperature of the reaction mixture.
What is the resolution of the temperature sensor?
1 × 10−1 °C
1 × 10−2 °C
1 × 10−3 °C
1 × 10−4 °C
What is the resolution of this stopwatch?
0.01 s
0.05 s
0.1 s
0.005 s
What is meant by uncertainty?
The interval within which the true value
of a quantity can be expected to lie.
For a measuring instrument, the smallest change
in a quantity that gives a change in the reading that can be seen.
A measurement result which is judged
to be close to the true value.
Measurements which there is very little spread about the mean value.
For a set of repeat measurements,
the uncertainty is ± half the range.
TRUE or FALSE
TRUE
FALSE
The student determined
the density of a material three times.
Determine the uncertainty in the student’s results.
80 kg/m3
160 kg/m3
10 kg/m3
20 kg/m3
What is the mean and best estimate of
the uncertainty for this set of readings:
61.0 s, 63.0 s, 62.0 s, 62.5 s, 61.5 s?
61.0 ± 0.1 s
62.0 ± 0.2 s
62.0 s ± 1.0 s
What is the temperature and uncertainty indicated by this thermometer?
24 ± 0.5 °C
24 ± 1 °C
25 ± 0.5 °C
25 ± 1 °C
A stopwatch has a resolution of 0.01 seconds.
What is the best estimate of uncertainty of its readings?
± 0.01 s
± 0.05 s
± 0.1 s
± 0.005 s
