Clouds are collections of tiny water droplets or ice crystals that float in the sky. They form when warm air rises and cools, causing moisture to condense. There are different types of clouds, such as fluffy cumulus clouds that look like cotton balls and dark nimbus clouds that bring rain. Clouds play an important role in our weather. They help regulate the Earth's temperature by reflecting sunlight and trapping heat. When clouds become heavy with water, they release it as precipitation, which is essential for plants, animals, and humans. Without clouds, our planet would be very different!