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

The correct answer is It increases..

Exam lens: Write the relationship, substitute values only when needed, and finish by interpreting the result. 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 describe how increasing temperature increases the average kinetic energy of particles. 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 227 is distinct because it uses this exact question context and the exam lens rather than a generic particle-model sentence.