The Sun is a stable star that releases a vast amount of energy. Which statement correctly describes the primary nuclear reaction occurring in the core of the Sun?
Nuclear fission of hydrogen nuclei into helium nuclei.
Nuclear fusion of hydrogen nuclei into helium nuclei.
Nuclear fission of helium nuclei into hydrogen nuclei.
Nuclear fusion of helium nuclei into 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.