Hydrogen fusion in the core of a star of similar mass to the Sun decreases as the hydrogen is used up. Which sequence describes the initial response of the core?
Less outward support; contraction under gravity; rising temperature.
Less outward support; expansion against gravity; rising temperature.
More outward support; contraction under gravity; falling temperature.
More outward support; expansion against gravity; falling temperature.
75 exam-style questions on Edexcel GCSE Physics 7.3 Stars, covering 7.3.1 Evolution of stars similar to the Sun, 7.3.2 Evolution of massive stars, and 7.3.3 Observing the Universe. Each one has a worked solution and a mark scheme showing where the marks go.