Here's why:
* Water Vapor: The air always contains some amount of water vapor, which is invisible.
* Cooling and Saturation: As air rises, it cools. Cooler air can hold less water vapor. When the air cools enough, it becomes saturated, meaning it can't hold any more water vapor.
* Condensation: The excess water vapor then changes from a gas (vapor) into a liquid (water droplets) or solid (ice crystals). This process is called condensation.
* Cloud Formation: These tiny droplets or crystals cluster together to form visible clouds.
Let me know if you'd like to know more about different types of clouds!