What happens to gas pressure when the volume of the gas is decreased?

When the volume of a gas is decreased, the particles of the gas are forced closer together. According to Boyle's Law, which states that pressure and volume are inversely related when temperature and the amount of gas remain constant, a decrease in volume results in an increase in pressure. This is due to the fact that as the volume decreases, the same number of gas molecules occupy a smaller space, leading to more frequent collisions between the gas particles and the walls of the container. These increased collisions translate into higher pressure. Therefore, understanding this relationship is crucial for predicting how gases will behave under various changes in volume.