Why does a gas get hotter when it is compressed quickly?

The correct answer is The work done on the gas increases its internal energy..

Practical lens: Link apparatus, readings, and uncertainty to the exact measurement named in the objective. This question asks: Why does a gas get hotter when it is compressed quickly. The correct response is The work done on the gas increases its internal energy., 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 increasing internal energy can increase the temperature of a gas. 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 602 is distinct because it uses this exact question context and the practical lens rather than a generic particle-model sentence.