Pressure and temperature changes are fundamental concepts in physics and chemistry. When pressure increases in a closed system, such as a gas in a container, the temperature often rises as well. This is because the molecules are compressed, causing them to collide more frequently and with greater energy, which raises the temperature. Conversely, when pressure decreases, the temperature can drop. For example, when a gas expands, it does work on its surroundings, leading to a loss of energy and a decrease in temperature. This relationship is described by the Ideal Gas Law, which connects pressure, volume, and temperature in gases.