A sealed steel can contains air. The volume of the can does not change. The can is heated. What happens to the pressure of the air inside the can?
It decreases, because the air molecules move more slowly.
It decreases, because the molecules spread further apart.
It increases, because the molecules hit the walls harder.
It stays the same, because the volume of the can is fixed.
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.