How does increasing the temperature of a gas affect its particles?

The correct answer is It increases their average kinetic energy.

Application lens: Apply the rule to the specific sample or situation instead of reciting a broad fact. This question asks: How does increasing the temperature of a gas affect its particles. The correct response is It increases their average kinetic energy, because gas pressure comes from particle collisions with container walls. In Particle motion in gases, the marking point should connect directly to explain that collisions of gas particles with container walls exert a force on the walls. 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 Particle model and pressure, 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 463 is distinct because it uses this exact question context and the application lens rather than a generic particle-model sentence.