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2.2 Thermal properties and temperature

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Question 121

When railway tracks are laid down, small gaps are left between the steel rails.

Why are these gaps necessary?

A

Steel contracts on hot days.

B

Steel expands on hot days.

C

The gaps expand on hot days.

D

The gaps contract on cold days.

Markscheme

2.2 Thermal properties and temperature Questions

  1. IGCSE
  2. /Physics
  3. /2.2 Thermal properties and temperature

528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.

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