Cloud names come from Latin words. Strato means sheet-like. Cumulus means heap or pile. Nimbo means rain. Cirro means a hair.
Cumulus clouds resemble heaps of cotton or a piece of popcorn, or even cauliflower.
They are usually seen billowing across the sky in clear weather, when the sky is blue. They are made when sunshine warms up bubbles of moist air causing them to rise quickly. They are always changing shape. Cirrus clouds are feathery clouds that form high up in the air. They are the highest clouds.