How do clouds float?

Clouds float because their water is split into tiny drops or ice crystals that fall very slowly. At the same time, warm air often rises underneath them. When the upward air movement matches or beats their slow fall, the cloud stays high in the sky.

The surprising part is that a cloud can contain a huge amount of water and still look weightless. Its drops are spread through a vast puff of air, so each one is tiny enough for moving air to keep lifting and nudging it around.