A sample of gas is kept at a constant temperature. When the volume of the container is decreased, the pressure of the gas increases.
Which statement explains why the pressure increases?
The gas particles expand and take up more space.
The gas particles now move at a much higher average speed.
The gas particles collide with the walls of the container more frequently.
The gas particles cease colliding with each other and only hit the walls.
38 exam-style questions on Edexcel GCSE Physics 14.3 Gas pressure and temperature, covering 14.3.1 Gas pressure and particle motion, 14.3.2 Temperature and pressure at constant volume, 14.3.3 Absolute zero and the kelvin scale, 14.3.4 Compressing and expanding gases, 14.3.5 Volume and pressure at constant temperature, and 14.3.6 Doing work on a gas. Each one has a worked solution and a mark scheme showing where the marks go.