Which row in the table correctly describes how cooling changes the density of air, and identifies the method of thermal energy transfer caused by this density change?
Density of airMethod of energy transferAdecreasesconductionBdecreasesconvectionCincreasesconductionDincreasesconvection \begin{array}{|c|c|c|}\hline & \text{Density of air} & \text{Method of energy transfer} \\ \hline \text{A} & \text{decreases} & \text{conduction} \\ \hline \text{B} & \text{decreases} & \text{convection} \\ \hline \text{C} & \text{increases} & \text{conduction} \\ \hline \text{D} & \text{increases} & \text{convection} \\ \hline \end{array} ABCDDensity of airdecreasesdecreasesincreasesincreasesMethod of energy transferconductionconvectionconductionconvectionRow A
Row B
Row C
Row D
301 exam-style questions on CIE IGCSE Physics 2.3 Transfer of thermal energy, covering 2.3.1a Thermal conductors and thermal insulators, 2.3.1b Explaining thermal conduction, 2.3.2 Convection, 2.3.3a Thermal radiation, 2.3.3b Surface colour and texture, 2.3.3c Rate of emission and absorption of radiation, and 2.3.4 Consequences of thermal energy transfer. Each one has a worked solution and a mark scheme showing where the marks go.