The process by which ice changes directly to water vapor is called sublimation. This physical transition occurs when solid ice absorbs enough heat energy to break the molecular bonds holding it together, allowing it to directly transform into a gaseous state without first becoming liquid water. Sublimation is commonly seen in nature, particularly in cold, dry environments where ice and snow can disappear without melting. An everyday example is dry ice (solid carbon dioxide) sublimating at room temperature, creating fog-like vapors. This process plays a significant role in the water cycle and is critical in various scientific and industrial applications.