A star about the same size as the Sun is observed as the hydrogen supply in its core becomes low.
| Observation | Radius (million km) | Surface temperature (K) |
|---|---|---|
| Before the core hydrogen supply became low | 0.7 | 5800 |
| Later | 35 | 3500 |
Explain what stage the star has entered and why the observations are consistent with this change.
84 exam-style questions on AQA GCSE Physics 8.1 Solar system; stability of orbital motions; satellites, covering 8.1.1 Our solar system, 8.1.2 The life cycle of a star, and 8.1.3 Orbital motion, natural and artificial satellites. Each one has a worked solution and a mark scheme showing where the marks go.