Examples of Gas laws

Charles's law states that when there is constant pressure, temperature and volume are directly related.
An example of this is the pop can lab, when the can went from warm to cold it imploded therefor decreasing the volume of the can.

Boyle's law states that when there is constant temperature, pressure and volume are inversely related to each other. An example of this law is the fog cannon, when the curtain was hit it decreased the volume and increased pressure caused the fog to shoot out.

Gay Lusaac's law states that when there is a constant volume, pressure and temperature are directly related to each other. An example would be the balloon in the flask, when you heated up the water in the flask and then removed the water and covered the top with the balloon the gas inflated the balloon, when you put the balloon into the cold water the pressure on the inside decreased and the balloon was pushed in because the outside pressure was higher.