How does heating affect the energy stored within a system?

The correct answer is It increases the energy stored.

Evidence lens: Use the data, graph feature, practical observation, or particle behaviour that proves the answer. This question asks: How does heating affect the energy stored within a system. The correct response is It increases the energy stored, because internal energy combines particle kinetic and potential energy. In Internal energy, the marking point should connect directly to define internal energy as the total kinetic energy and potential energy of all particles in a system. 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 213 is distinct because it uses this exact question context and the evidence lens rather than a generic particle-model sentence.