Which statement about the production of energy in main sequence stars, such as the Sun, is correct?
Stars are powered by nuclear fission, where helium nuclei split into hydrogen nuclei.
Stars are powered by chemical combustion, which mainly releases radio waves and microwaves.
Stars are powered by nuclear fusion, where lighter nuclei combine to form heavier nuclei, releasing energy.
Stars are powered by nuclear fusion, which splits uranium nuclei into helium nuclei.
20 exam-style questions on CIE IGCSE Physics 6.2.1 The Sun as a star. Each one has a worked solution and a mark scheme showing where the marks go.