Water is continually cycled from one reservoir to another in the global hydrologic cycle. The process whereby liquid water vaporizes into the atmosphere is known as evaporation and the process whereby ice or snow vaporizes into the atmosphere without first becoming liquid is known as __________.
Sublimation is the conversion of a compound in solid state directly to gaseous state without passing through the liquid phase. Iodine crystals is a typical example of a substance that undergoes sublimation.