Describe the effect of compressing a gas quickly on its temperature.

When a gas is compressed quickly, its temperature increases due to the rapid increase in internal energy. The gas particles gain kinetic energy from the work done on them, resulting in more frequent and forceful collisions.

Comparison lens: State both sides of the comparison so the contrast is explicit rather than implied. This question asks: Describe the effect of compressing a gas quickly on its temperature. The correct response is When a gas is compressed quickly, its temperature increases due to the rapid increase in internal energy. The gas particles gain kinetic energy from the work done on them, resulting in more frequent and forceful collisions., because gas pressure comes from particle collisions with container walls. In Increasing the pressure of a gas (physics only) (HT only), the marking point should connect directly to (Physics only) (HT only) Explain that compressing a gas can increase its 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 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 593 is distinct because it uses this exact question context and the comparison lens rather than a generic particle-model sentence.