The Big Bang and Steady State theories are two cosmological models used to explain the origin and nature of the universe.
Explain why the observation of red-shift in distant galaxies supports both theories, whereas the detection of Cosmic Microwave Background (CMB) radiation supports only the Big Bang theory.
53 exam-style questions on Edexcel GCSE Physics 7.2 The Universe and red-shift, covering 7.2.1 Big Bang and Steady State theories, 7.2.2 Evidence for the Big Bang, 7.2.3 The Doppler effect and red-shift, 7.2.4 Red-shift as evidence for an expanding Universe, and 7.2.5 The CMB and the accepted model. Each one has a worked solution and a mark scheme showing where the marks go.