The process by which a solid directly turns into a gas without becoming liquid is called sublimation. This phase transition occurs under specific conditions, often involving low pressure and high temperature, allowing some solids to gain enough energy to vaporize directly. An everyday example of sublimation is dry ice, which is solid carbon dioxide. When exposed to atmospheric conditions, it sublimates directly into carbon dioxide gas, circumventing the liquid phase. Sublimation is important in various scientific and industrial applications, such as freeze-drying, where moisture is removed from products without liquid water appearing.