A physics teacher tells a class:
"Measurements may give a precise value for the quantity being determined but this may not necessarily be an accurate value”
Describe what is meant by
Draw lines on Fig. 1.1 to show how accuracy and precision are affected by different types of error
Fig. 1.1
The teacher uses the diagram shown in Fig. 1.2 to illustrate the difference between accuracy and precision.
The circles represent targets A, B, C and D and the dots represent arrows hitting the targets.
neither accurate nor precise accurate but not precise precise but not accurate both accurate and precise |
B is ................................................................................
C is ................................................................................
D is ................................................................................
The temperature of the air in a room is measured using a mercury-in-glass thermometer.
For each of the following, tick [✓] one box to indicate whether the experimental technique would improve accuracy, precision or neither. The first row has been completed as an example.
improves accuracy | improves precision | improves neither | |
correcting for an incorrectly calibrated thermometer | ✓ | ||
taking repeat readings of temperature and finding an average | |||
using a thermometer with a linear scale | |||
keeping your eye in line with the scale and the liquid level for each temperature reading |
Did this page help you?