Clouds are collections of tiny water droplets or ice crystals that are suspended in the air. They form when moist air rises and cools, and the water in the air condenses into tiny droplets or crystals. Clouds come in many different shapes and sizes, and they can be found at many different heights in the sky. Some clouds are white and fluffy, while others are dark and stormy. They can be as small as a few feet across, or they can be so big that they cover entire countries. Clouds are an important part of Earth’s weather system, and they help to regulate the temperature of the planet.