A stellar-evolution display shows two pathways. Pathway X is for a star with a mass similar to the Sun; after its red giant stage, its outer layers drift into space. Pathway Y shows a red supergiant exploding as a supernova, leaving a core of moderate mass.
Which pair of remnant labels completes pathways X and Y, respectively?
X: black hole; Y: neutron star.
X: white dwarf; Y: black hole.
X: neutron star; Y: white dwarf.
X: white dwarf; Y: neutron star.
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.