A dark asphalt parking lot lies adjacent to a grassy park.
On a sunny day, the Sun warms the parking lot. Describe how thermal energy from the Sun reaches the Earth and warms the asphalt.
The temperature of the dark asphalt is higher than the temperature of the green grass. Suggest one reason why the temperature of the asphalt is higher than that of the grass.
The air directly above the parking lot is heated by the warm asphalt.
Describe how this heating affects the molecules of the warm air.
A person standing at the edge of the parking lot notices a cool breeze blowing from the grassy park towards the parking lot. Explain how convection produces this breeze.
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.