Question

when water in the atmosphere changes form from a vapor to a liquid, forming clouds, what phase change has occurred?
condensation
sublimation
evaporation
precipitation

Explanation:

• Condensation is the process where a gas (vapor) changes to a liquid. In the case of clouds, water vapor in the atmosphere cools and condenses into liquid water droplets.
• Sublimation is the change from a solid to a gas (or vice - versa) without passing through the liquid state.
• Evaporation is the change from a liquid to a gas.
• Precipitation is the process of water (in various forms like rain, snow) falling from the atmosphere to the Earth's surface. It is not a phase change from vapor to liquid (the phase change has already occurred before precipitation).

Answer:

condensation