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Measuring Cylinder Resolution
Figure 11 shows the measuring cylinder used to measure the volume of the metal ring.
| Volume of water in cm³ | Volume of water and ring in cm³ | Volume of ring in cm³ |
|---|---|---|
| 5.0 | 5.4 | 0.4 |
The true volume of the ring was 0.44 cm³.
Even without using the string, the measuring cylinder could not give an accurate value for the volume of the ring.
Give one reason why.
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Marking points
- 1 Specifies that the cylinder cannot resolve 0.44 cm³ to two decimal places, or gives its resolution as 0.2 cm³ (allow 0.1 cm³).
Full-mark answer
The measuring cylinder has a resolution of 0.2 cm³, so it cannot measure a volume such as 0.44 cm³ to two decimal places.
Why this answer loses marks
The resolution is too low.
This is unqualified. Explain that the cylinder’s smallest division cannot distinguish the decimal precision needed for the ring’s volume.