A car tyre is pumped up in the morning. By the afternoon the air inside the tyre has become warmer. The volume of the tyre does not change. Why does the pressure of the air in the tyre increase?
The air molecules hit the tyre walls more often and more forcefully.
There is a larger number of air molecules inside the warm tyre.
The air molecules inside the tyre have expanded and become larger.
The weight of the air inside the tyre presses harder on the walls.
40 exam-style questions on AQA GCSE Physics 3.3 Particle model and pressure, covering 3.3.1 Particle motion in gases, 3.3.2 Pressure in gases, and 3.3.3 Increasing the pressure of a gas (HT only). Each one has a worked solution and a mark scheme showing where the marks go.