The Big Bang and Steady State theories are two different models of the universe.
Redshift of light from distant galaxies supports both theories, but the discovery of Cosmic Microwave Background (CMB) radiation supports only the Big Bang theory.
Explain why redshift supports both models, whereas CMB radiation only supports the Big Bang theory.
53 exam-style questions on Edexcel GCSE Physics 7.2 The Universe and red-shift. Each one has a worked solution and a mark scheme showing where the marks go.