Nubes, or clouds, are visible masses of condensed water vapor floating in the atmosphere. They form when warm air rises, cools, and loses its ability to hold moisture, resulting in tiny water droplets or ice crystals. Nubes come in various shapes and sizes, and they play a crucial role in the Earth's weather and climate systems. There are several types of nubes, including cumulus, stratus, and cirrus. Each type has distinct characteristics and can indicate different weather conditions. For example, cumulus clouds are fluffy and often signal fair weather, while stratus clouds can bring overcast skies and light rain.