The term for the process of converting a solid directly into vapor, bypassing the liquid phase, is called sublimation. This phenomenon occurs under specific conditions, often involving a decrease in pressure or an increase in temperature. Sublimation is commonly observed in substances such as dry ice (solid carbon dioxide) and certain types of snow or frost. This process has practical applications in various fields, including freeze-drying in food preservation and the manufacturing of certain chemicals. Understanding sublimation is also important in climate studies and atmospheric science.