## Is it possible to tell which thermometer is more precise?

1.  The boiling point of water is measured four times. The results are 110.01°C, 110.02°C, 109.99°C, and 110.01°C. Which of the following statements best describes this measuring process?

b.  Accurate but not precise

c.    Precise but not accurate

d.   Neither accurate nor precise

e.  Both accurate and precise

2.   Two thermometers are calibrated by measuring the freezing point of glacial acetic acid, which is 16.6°C. Equal numbers of measurements are taken with each thermometer. The result from the first thermometer is 16.4 ± 0.2°C and the result from the second thermometer is 16.8 ± 0.1°C.

a.   Is it possible to tell which thermometer is more accurate? If so, say which one. If not, explain why.

b.  Is it possible to tell which thermometer is more precise? If so, say which one. If not, explain why.

3.   The weight of an object is given as 67.2 ± 0.3 g. True or false:

a.  The weight was measured to be 67.2 g.

b.  The true weight of the object is 67.2 g.

c.   The bias in the measurement is 0.3 g.

d.   The uncertainty in the measurement is 0.3 g.

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