Most Clouds Form In The Atmosphere When Moist Air - Web clouds form when air becomes saturated, or filled, with water vapor. Clouds are the visible result of that squeeze of cooler, moist air. Clouds are made of water droplets or ice crystals that are so small and light they are able to stay up in the air. Warm air can hold more water vapor than cold air, so lowering the temperature of an air mass is like squeezing a sponge. Moist air becomes cloudy with only slight cooling. Web as air rises it cools and decreases pressure, spreading out. Clouds form when the air cools below the dewpoint, and the air can not hold as much water vapor.
Warm air can hold more water vapor than cold air, so lowering the temperature of an air mass is like squeezing a sponge. Clouds are made of water droplets or ice crystals that are so small and light they are able to stay up in the air. Web as air rises it cools and decreases pressure, spreading out. Clouds form when the air cools below the dewpoint, and the air can not hold as much water vapor. Web clouds form when air becomes saturated, or filled, with water vapor. Clouds are the visible result of that squeeze of cooler, moist air. Moist air becomes cloudy with only slight cooling.