Abeka Science Earth and Space Test 8 Practice 2026 - Free Earth and Space Test Practice Questions and Study Guide

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What is the process called when water vapor changes directly to a solid, forming frost?

Deposition

Deposition. Water vapor changes directly into a solid when cold air causes the vapor to lose enough energy to skip the liquid phase and crystallize as frost on surfaces. This is different from sublimation (solid to gas), condensation (gas to liquid), or evaporation (liquid to gas). Frost forms when surfaces are at or below freezing and humidity is high enough for water vapor to deposit as ice crystals.

Sublimation

Condensation

Evaporation

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