An atmospheric probe counts the number of air molecules in equal volumes of air at three altitudes. The probe also measures atmospheric pressure at each altitude.
| Altitude above the ground (km) | Number of air molecules in each equal-volume sample |
|---|---|
| 1.0 | 2.2 × 10¹⁹ |
| 5.0 | 1.4 × 10¹⁹ |
| 9.0 | 8.8 × 10¹⁸ |
Use the data to explain how the density of the atmosphere and the atmospheric pressure change as altitude increases.
108 exam-style questions on AQA GCSE Physics 5.5 Pressure and pressure differences in fluids, covering 5.5.1 Pressure in a fluid and 5.5.2 Atmospheric pressure. Each one has a worked solution and a mark scheme showing where the marks go.