Both the Big Bang and Steady State theories can account for galactic red-shift.
Why did the discovery of the cosmic microwave background favour the Big Bang theory?
It showed that galactic red-shift was a measurement error.
It showed that the Universe had stopped expanding.
It provided additional evidence predicted by the Big Bang theory.
It provided additional evidence for continuous matter creation.
94 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.