A student blows up a balloon and ties the end. She puts the balloon in a freezer.
After one hour, the balloon is smaller.
Complete the sentences about the air inside the balloon.
Use words from the list. Each word may be used once, more than once or not at all.
faster slower more less larger smaller
In the freezer, the temperature of the air decreases. The air particles move ____________.
The particles hit the inside of the balloon ____________ often.
The pressure of the air inside the balloon decreases, so the balloon gets ____________.
The student takes the balloon out of the freezer.
Predict what happens to the size of the balloon as it warms up to room temperature.
The air inside the balloon pushes on the rubber.
State the direction of the force from the air pressure on the rubber.
50 exam-style questions on OCR GCSE Physics 1.3 Pressure, covering 1.3.1 Molecular motion, temperature and gas pressure, 1.3.2 Gas pressure at constant volume, 1.3.3 Compressing and expanding gases, 1.3.4 Gas volume and pressure at constant temperature, 1.3.5 Doing work on a gas, 1.3.6 The Earth's atmosphere and atmospheric pressure, 1.3.7 Atmospheric pressure and height, 1.3.8 Floating and sinking, 1.3.9 Pressure in liquids and upthrust, and 1.3.10 Pressure differences with depth. Each one has a worked solution and a mark scheme showing where the marks go.