Explain how compressing a gas can lead to an increase in its temperature.

When a gas is compressed, the particles are forced closer together, which increases the frequency of collisions between them. This increase in collisions transfers energy to the particles, raising their average kinetic energy and, consequently, the temperature of the gas.

Method lens: First identify the measured quantity, then match the equation or particle idea to the command word. This question asks: Explain how compressing a gas can lead to an increase in its temperature. The correct response is When a gas is compressed, the particles are forced closer together, which increases the frequency of collisions between them. This increase in collisions transfers energy to the particles, raising their average kinetic energy and, consequently, the temperature of the gas., because density links mass and volume, so the answer must preserve which quantity is being calculated. In Increasing the pressure of a gas (physics only) (HT only), the marking point should connect directly to (Physics only) (HT only) Distinguish temperature increase during compression from pressure increase caused by reduced volume. 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 620 is distinct because it uses this exact question context and the method lens rather than a generic particle-model sentence.