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7.2 The Universe and red-shift

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Question 24

Astronomers estimate the average density of the Universe at two different ages. The density today is used as a reference value of 1.0.

Age of the Universe being observedAverage density relative to today's density
Much earlier5.8
Today1.0

Explain which theory these results support more strongly.

[3]
Markscheme

7.2 The Universe and red-shift Questions

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

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.

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