A massive star has more hydrogen than the Sun but spends less time on the main sequence. Which statement explains both observations?
It uses hydrogen more slowly, so the larger supply lasts less time.
It uses hydrogen more quickly, so the larger supply lasts less time.
It uses hydrogen more slowly, so the larger supply lasts more time.
It uses hydrogen more quickly, so the larger supply lasts more time.
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.