It's a process called sublimation. The easiest example of sublimation might be dry ice. Dry ice is solid carbon dioxide (CO2). Amazingly, when you leave dry ice out in a room, it just turns into a gas. Deposition occurs when a gas becomes a solid without going through the liquid state of matter.
Then, what is it called when a solid goes straight to a gas?
Deposition is a thermodynamic process, a phase transition in which gas transforms into solid without passing through the liquid phase. The reverse of deposition is sublimation and hence sometimes deposition is called desublimation. This causes the water vapor to change directly into a solid.
What is the term for a solid turning into gas?
Liquid to gas phase transitions are known as "vaporization." Liquid to solid phase transitions are known as "freezing." Solid to liquid phase transitions are known as "melting." Solid to gas phase transitions are known as "sublimation." In most cases, solids turn into gases only after an intermediate liquid state.
What is it called when a solid turns straight into a gas?
Under certain circumstances, gas can transform directly into a solid. This process is called deposition. Water vapor to ice - Water vapor transforms directly into ice without becoming a liquid, a process that often occurs on windows during the winter months.