A student determines the density of a small aluminium block five times. The table shows the student's results.
Table: Five values for the density of one aluminium block, determined by the same student
| Attempt | Density in g/cm3\text{g/cm}^3g/cm3 |
|---|---|
| 1 | 2.71 |
| 2 | 2.68 |
| 3 | 2.70 |
| 4 | 3.15 |
| 5 | 2.72 |
Identify the anomalous result.
Calculate the mean density of the block. Do not include the anomalous result.
The edges of the block are rounded. Suggest why measuring the volume of this block with a ruler is less accurate than finding its volume by displacement.
Explain why the student determined the density five times.
40 exam-style questions on AQA GCSE Physics 3.1 Changes of state and the particle model, covering 3.1.1 Density of materials and 3.1.2 Changes of state. Each one has a worked solution and a mark scheme showing where the marks go.