What happens to the energy of particles during melting?

The correct answer is Energy is absorbed as particles gain motion..

Unit lens: Check the units before giving the final statement so the physics quantity is not swapped. This question asks: What happens to the energy of particles during melting. The correct response is Energy is absorbed as particles gain motion., because the particle model explains the observable property using particles. In Changes of state, the marking point should connect directly to describe limitations of simple particle model diagrams for representing real particles, forces and motion. 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 Changes of state and the particle model, 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 205 is distinct because it uses this exact question context and the unit lens rather than a generic particle-model sentence.