The process where water vapor changes directly into solid is called deposition.

Here's a breakdown:

* Water vapor: This is the gaseous state of water.

* Solid: This refers to ice or frost.

* Deposition: The process where water vapor skips the liquid phase and directly transforms into a solid.

Examples of deposition:

* Frost: When cold air comes into contact with a surface that's below freezing, the water vapor in the air directly turns into tiny ice crystals, forming frost.

* Snow: In clouds, water vapor directly turns into ice crystals, forming snowflakes.

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