CLEAPSS Supporting practical science and technology
Gas Law Boyle's Law
Students have to learn about the gas laws, how properties of a gas such as pressure, volume and temperature change relative to each other. 

With readily available, simple equipment, it is possible toinvestigate the pressure-volume relationship known as Boyle’s Law. For more about how to do this see CLEAPSS Guide PP028http://science.cleapss.org.uk/Resource/PP028-Investigating-gas-laws-1-pressure-volume-Boyle-s-law.pdf