The sky clouds are made of tiny water droplets or ice crystals. These droplets or crystals form when water vapour in the air condenses. Condensation occurs when the air cools and the water vapour can no longer hold its gaseous state. The droplets or crystals then collide with each other and grow larger, eventually forming clouds.

The type of cloud that forms depends on the temperature and humidity of the air. For example, cirrus clouds are thin, wispy clouds made of ice crystals, while cumulus clouds are puffy clouds made of water droplets.

Clouds play an important role in the Earth's climate. They reflect sunlight back into space, which helps to cool the planet. They also trap heat near the Earth's surface, which helps to keep the planet warm. Clouds also produce rain and snow, which are essential for plant and animal life.