Which is most likely to cause clouds to form in a previously clear sky? (1 point)

Answer 1

Clouds are most likely to form in a previously clear sky when moist air rises and cools. This can happen due to several processes, such as:

1. Convection: Warm air rises, causing the moisture in that air to cool and condense into clouds.
2. Frontal lifting: When warm, moist air is forced to rise over cooler air masses, it cools and forms clouds.
3. Orographic lifting: Air is forced to rise over mountains, leading to cooling and cloud formation.

Out of these, the most common factor that can suddenly cause clouds to form in a clear sky is convection, especially on warm days when the sun heats the ground and causes warm air to rise.