Gas laws describe the behavior of gases in relation to pressure, volume, and temperature. These laws help us understand how gases expand, compress, and change states. Key gas laws include Boyle's Law, which states that pressure and volume are inversely related at constant temperature, and Charles's Law, which indicates that volume is directly proportional to temperature at constant pressure. Another important law is Avogadro's Law, which asserts that equal volumes of gases contain the same number of molecules at the same temperature and pressure. Together, these laws form the foundation for understanding gas behavior in various scientific and practical applications.