An athlete feels cold after exercising on a warm, windy day due to the sweat on their skin.
Why do they feel cold even though the surrounding air is warm?
The less energetic water molecules in the sweat escape quickly.
The more energetic water molecules in the sweat do not escape quickly.
The sweat on their skin does not evaporate quickly enough to cool them.
The sweat on their skin evaporates quickly in the wind, removing thermal energy from their skin.
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.