The Big Bang theory is the currently accepted model of the origin of the Universe.
Which statement gives the best scientific justification?
It explains more of the available evidence than the Steady State theory.
It proves that no future observation can change our ideas about the Universe.
It explains red-shift while the Steady State theory predicts no expansion.
It proves that the microwave background comes from newly formed stars.
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.