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6.2 Stars and the Universe

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Question 53

The Sun is a stable main-sequence star. Which statement correctly describes the primary nuclear reaction taking place in its core to release energy?

A

Nuclear fusion, where hydrogen nuclei join to form helium nuclei.

B

Nuclear fission, where helium nuclei split into hydrogen nuclei.

C

Nuclear fusion, where helium nuclei join to form hydrogen nuclei.

D

Nuclear fission, where hydrogen nuclei split into helium nuclei.

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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