Final answer:
Deposition is the phase change where a gas turns directly into a solid, with frost formation being a common example.
Step-by-step explanation:
The process in which matter changes from a gas to a solid is known as deposition. This process is the reverse of sublimation, which is when a solid turns directly into a gas, bypassing the liquid phase. An example of deposition is the formation of frost as water vapor in the air turns into ice without becoming liquid first.