Why does a gas get hotter when compressed quickly?

The correct answer is Because work done increases internal energy.

Method lens: First identify the measured quantity, then match the equation or particle idea to the command word. This question asks: Why does a gas get hotter when compressed quickly. The correct response is Because work done increases 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 doing work on a gas transfers energy to the 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 584 is distinct because it uses this exact question context and the method lens rather than a generic particle-model sentence.