Physics 0625 · IGCSE · Transfer of thermal energy

Transfer of thermal energy — practice question

A student uses a straw to blow air through a liquid. As a result, the liquid evaporates more rapidly and so its temperature falls. Which statement explains why the liquid that is left behind cools?

  • ASlower-moving molecules are carried away by the air bubbles.
  • BThe air molecules conduct heat from the liquid.
  • CThe air sets up convection currents in the liquid.
  • DThe molecules with most energy leave the liquid.

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI