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6.2 Stars and the Universe

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Question 62

Energy is released by nuclear processes in space. Which row in the table correctly identifies the type of nuclear process that powers stars, such as the Sun, and the primary fuel consumed in this reaction?

Type of reactionPrimary fuelAfissionuraniumBfissionhydrogenCfusionhydrogenDfusionhelium \begin{array}{|c|c|c|} \hline & \text{Type of reaction} & \text{Primary fuel} \\ \hline \text{A} & \text{fission} & \text{uranium} \\ \hline \text{B} & \text{fission} & \text{hydrogen} \\ \hline \text{C} & \text{fusion} & \text{hydrogen} \\ \hline \text{D} & \text{fusion} & \text{helium} \\ \hline \end{array} ABCD​Type of reactionfissionfissionfusionfusion​Primary fueluraniumhydrogenhydrogenhelium​​
A

Type of reaction: fission; Primary fuel: uranium

B

Type of reaction: fission; Primary fuel: hydrogen

C

Type of reaction: fusion; Primary fuel: hydrogen

D

Type of reaction: fusion; Primary fuel: helium

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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