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6.2 Stars and the Universe

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Question 6
a.

State the name of the force that holds stars together in a galaxy.

[1]
b.

Light from distant galaxies is redshifted. State what this observation indicates about the current state of the Universe.

[1]
c.

Cosmic microwave background radiation (CMBR) is detected coming from all directions in space.

Identify which cosmological theory is supported by the existence of CMBR.

[1]
d.

Explain how the expansion of the Universe has affected the wavelength of this radiation since it was emitted in the early Universe.

[2]
Markscheme

6.2 Stars and the Universe Questions

  1. IGCSE
  2. /Physics
  3. /6.2 Stars and the Universe

104 exam-style questions on CIE IGCSE Physics 6.2 Stars and the Universe, covering 6.2.1 The Sun as a star, 6.2.2a Galaxies and astronomical distances, 6.2.2b The life cycle of a star, 6.2.3a Galaxies and the scale of the Universe, 6.2.3b Redshift, 6.2.3c The Big Bang Theory and cosmic microwave background radiation, and 6.2.3d The Hubble constant and the age of the Universe. Each one has a worked solution and a mark scheme showing where the marks go.

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