What occurs to the frequency of particle collisions with the walls of a container when the volume of a gas is decreased (Pressure in gases (physics only))

The correct answer is The frequency of collisions increases.

Application lens: Apply the rule to the specific sample or situation instead of reciting a broad fact. This question asks: What occurs to the frequency of particle collisions with the walls of a container when the volume of a gas is decreased (Pressure in gases (physics only)). The correct response is The frequency of collisions increases, because density links mass and volume, so the answer must preserve which quantity is being calculated. In Pressure in gases (physics only), the marking point should connect directly to (Physics only) State that pressure multiplied by volume is constant for a fixed mass of gas at constant temperature. 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 535 is distinct because it uses this exact question context and the application lens rather than a generic particle-model sentence.