How does heating a substance affect its internal energy?

The correct answer is It increases the internal energy by increasing particle energy..

Practical lens: Link apparatus, readings, and uncertainty to the exact measurement named in the objective. This question asks: How does heating a substance affect its internal energy. The correct response is It increases the internal energy by increasing particle energy., 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 230 is distinct because it uses this exact question context and the practical lens rather than a generic particle-model sentence.