What is the difference between boiling and evaporation?

The correct answer is Boiling occurs throughout the liquid, evaporation occurs only at the surface.

Method lens: First identify the measured quantity, then match the equation or particle idea to the command word. This question asks: What is the difference between boiling and evaporation. The correct response is Boiling occurs throughout the liquid, evaporation occurs only at the surface, because changes of state are explained by particle energy and arrangement. In Changes of state, the marking point should connect directly to explain boiling using particles gaining enough energy to separate throughout a liquid. If the question includes values, the working must keep the appropriate unit and operation; if it is an explanation, it must name the relevant particle behaviour or energy change. This item belongs to Changes of state and the particle model, so avoid answers that switch to a different quantity, confuse heat with temperature, or describe gas pressure without collisions when collisions are the reason. Checkpoint 140 is distinct because it uses this exact question context and the method lens rather than a generic particle-model sentence.