Some water is placed in an open plastic cup on a wooden deck. The cup, the water, the deck, and the surrounding air are all initially at the same temperature.
The temperature of the water now starts to decrease below the ambient temperature.
What is the primary cause of this temperature decrease?
conduction of heat from the cup to the wooden deck
convection currents established in the surrounding air
evaporation of the water
net infrared radiation emitted by the water to the air
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.