In terms of particles and their motion, explain why a metal rod undergoes thermal expansion when heated.
State one practical engineering problem caused by the thermal expansion or contraction of concrete or steel structures (such as bridges or railway tracks), and describe how this issue is solved.
A bimetallic strip is made of two different metals bonded together. Describe how this strip can be used as a temperature-sensitive switch, explaining how it functions when the temperature increases.
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.