Which of the following describes the primary energy-producing process in the core of a stable main-sequence star?
The nuclear fission of helium nuclei into hydrogen nuclei.
The nuclear fusion of hydrogen nuclei to form helium nuclei.
The nuclear fission of heavy elements like uranium into lighter metallic nuclei.
The nuclear fusion of helium nuclei to form carbon nuclei.
104 exam-style questions on CIE IGCSE Physics 6.2 Stars and the Universe, covering 6.2.1 The Sun as a star, 6.2.2a Galaxies and astronomical distances, 6.2.2b The life cycle of a star, 6.2.3a Galaxies and the scale of the Universe, 6.2.3b Redshift, 6.2.3c The Big Bang Theory and cosmic microwave background radiation, and 6.2.3d The Hubble constant and the age of the Universe. Each one has a worked solution and a mark scheme showing where the marks go.