A survey finds that nearly all distant galaxies are red-shifted, but one nearby galaxy is blue-shifted.
Which conclusion is justified?
The nearby galaxy shows that all distances in the Universe are decreasing.
The nearby galaxy approaches us, while the wider pattern supports expansion.
The nearby galaxy recedes from us, while the wider pattern supports contraction.
The nearby galaxy shows that all distant red-shifts must be instrument errors.
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.