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7.2 The Universe and red-shift

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Question 15

Two competing models of the Universe's evolution are the Big Bang theory and the Steady State theory. Three major observational discoveries are:

I. The cosmological red-shift of distant galaxies.II. The Cosmic Microwave Background Radiation (CMBR).III. The primordial cosmic abundance ratio of helium-4 to hydrogen. \begin{aligned} &\text{I. The cosmological red-shift of distant galaxies.} \\ &\text{II. The Cosmic Microwave Background Radiation (CMBR).} \\ &\text{III. The primordial cosmic abundance ratio of helium-4 to hydrogen.} \end{aligned} ​I. The cosmological red-shift of distant galaxies.II. The Cosmic Microwave Background Radiation (CMBR).III. The primordial cosmic abundance ratio of helium-4 to hydrogen.​

Which of these discoveries can be explained by both theories, and which can only be explained by the Big Bang theory?

A

Both: I and III; Big Bang only: II

B

Both: I only; Big Bang only: II and III

C

Both: I and II; Big Bang only: III

D

Both: None; Big Bang only: I, II, and III

Markscheme

7.2 The Universe and red-shift Questions

  1. GCSE
  2. /Physics
  3. /7.2 The Universe and red-shift

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.

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