What is the relationship between temperature and internal energy?

The correct answer is Temperature affects internal energy by changing particle motion.

Practical lens: Link apparatus, readings, and uncertainty to the exact measurement named in the objective. This question asks: What is the relationship between temperature and internal energy. The correct response is Temperature affects internal energy by changing particle motion, because the particle model explains the observable property using particles. In Internal energy, the marking point should connect directly to explain that heating changes the energy stored within a system by increasing particle 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 218 is distinct because it uses this exact question context and the practical lens rather than a generic particle-model sentence.