A gas is compressed from a volume of 4.0 m³ to 2.0 m³, resulting in a pressure increase from 50,000 Pa to what pressure (Pressure in gases (physics only))

The correct answer is 100,000 Pa.

Cause lens: Name the cause, then state the effect on particles, pressure, density, or energy. This question asks: A gas is compressed from a volume of 4.0 m³ to 2.0 m³, resulting in a pressure increase from 50,000 Pa to what pressure (Pressure in gases (physics only)). The correct response is 100,000 Pa, 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) Calculate volume when pressure changes 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 556 is distinct because it uses this exact question context and the cause lens rather than a generic particle-model sentence.