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2.2.1 Thermal expansion of solids, liquids and gases

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Question 7
a.

The temperature of a solid bar of steel is decreased.

State what happens to:

(i) the energy of the atoms due to their vibrations,

(ii) the average separation of the atoms,

(iii) the density of the steel.

[3]
b.

Steel railway tracks are laid in sections with small gaps left between successive pieces of rail.

Suggest why these gaps are left, referencing what would happen if they were not there.

[2]
Markscheme

2.2.1 Thermal expansion of solids, liquids and gases Questions

  1. IGCSE
  2. /Physics
  3. /2.2.1 Thermal expansion of solids, liquids and gases

96 exam-style questions on CIE IGCSE Physics 2.2.1 Thermal expansion of solids, liquids and gases. Each one has a worked solution and a mark scheme showing where the marks go.

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