A student investigates the relationship between the pressure and volume of a gas trapped inside a syringe.
At the start of the investigation, the volume of gas in the syringe is 36 cm336\text{ cm}^336 cm3 and the pressure gauge shows a value of 100 kPa100\text{ kPa}100 kPa.
State one variable that must be kept constant during this investigation.
The plunger of the syringe is pushed in so that the volume of the gas is decreased to 24 cm324\text{ cm}^324 cm3. Calculate the new pressure of the gas, assuming the temperature of the gas remains constant.
Explain, in terms of gas particles, why the pressure on the inside walls of the syringe increases when the volume of the gas is decreased.
8 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.