Liquid air is a cryogenic liquid formed by cooling air to extremely low temperatures, around -196 degrees Celsius (-321 degrees Fahrenheit). This process condenses the gases in the air, primarily nitrogen and oxygen, into a clear, pale blue liquid. Liquid air is used in various applications, including scientific research and industrial processes. When liquid air is exposed to higher temperatures, it rapidly vaporizes back into gas, creating a large volume of air. This property makes it useful for producing thrust in rockets and for cooling in superconducting magnets. Liquid air is also a key component in cryogenics, the study of materials at very low temperatures.