What happens to the average kinetic energy of particles when the temperature of a substance increases (Internal energy)

The correct answer is It increases.

Evidence lens: Use the data, graph feature, practical observation, or particle behaviour that proves the answer. This question asks: What happens to the average kinetic energy of particles when the temperature of a substance increases (Internal energy). The correct response is It increases, because internal energy combines particle kinetic and potential energy. In Internal energy, the marking point should connect directly to use particle motion and particle arrangement to describe changes in internal energy. 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 Internal energy and energy transfers, 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 261 is distinct because it uses this exact question context and the evidence lens rather than a generic particle-model sentence.