Which phenomenon is not caused by thermal expansion?
the cracking of a thick-walled glass mug when boiling water is poured into it
the expansion of a sealed balloon placed inside a vacuum chamber
the rise of a hot air balloon in cool atmospheric air
the buckling of steel railway tracks on an exceptionally hot summer day
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.