How does heating affect the energy stored within a system?

The correct answer is It increases the kinetic energy of the particles.

Practical lens: Link apparatus, readings, and uncertainty to the exact measurement named in the objective. This question asks: How does heating affect the energy stored within a system. The correct response is It increases the kinetic energy of the particles, 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 266 is distinct because it uses this exact question context and the practical lens rather than a generic particle-model sentence.