The clouds float in the atmosphere because of their low

1. Clouds are visible masses of tiny water droplets or ice crystals suspended in the atmosphere. 2. While individual water droplets or ice crystals are denser than air and do fall slowly (as drizzle or virga), they are extremely small and light. 3. These particles have a very low terminal velocity and are easily kept aloft by even slight upward air currents (updrafts). 4. Furthermore, the overall density of the cloud mass (the mixture of air, water droplets, and ice crystals) is very similar to, or slightly less than, the density of the surrounding clear air at the same altitude. This low density allows the cloud mass to 'float' due to buoyancy. 5. Therefore, the primary reason clouds float is their overall low density relative to the surrounding air and the support provided by air currents acting on the tiny constituent particles.