When sweat evaporates from a person's skin, it produces a cooling effect. Which statement correctly explains why this evaporation cools the remaining liquid on the skin?
The least energetic molecules escape, leaving behind molecules with a higher average kinetic energy, which decreases the temperature.
The least energetic molecules escape, leaving behind molecules with a lower average kinetic energy, which increases the temperature.
The most energetic molecules escape, leaving behind molecules with a lower average kinetic energy, which decreases the temperature.
The most energetic molecules escape, leaving behind molecules with a higher average kinetic energy, which increases the temperature.
313 exam-style questions on CIE IGCSE Physics 2.2.3a Melting, boiling, condensation and solidification. Each one has a worked solution and a mark scheme showing where the marks go.