What is the effect of increasing the volume of a gas on the frequency of collisions with the walls of its container at constant temperature (Pressure in gases (physics only)) ? P43-007 Pressure in gases (physics only) checkpoint

The correct answer is Collision frequency decreases ? P43-007 density measurement and calculation.

Practical lens: Link apparatus, readings, and uncertainty to the exact measurement named in the objective. This question asks: What is the effect of increasing the volume of a gas on the frequency of collisions with the walls of its container at constant temperature (Pressure in gases (physics only)) ?. The correct response is Collision frequency decreases ? P43-007 density measurement and calculation, 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) Explain why increasing the volume of a gas at constant temperature decreases its pressure. 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 530 is distinct because it uses this exact question context and the practical lens rather than a generic particle-model sentence.