Final answer:
Cirrus clouds are wispy clouds that form at high altitudes and are made up of ice crystals. They are commonly found in fair weather.
Step-by-step explanation:
Cirrus clouds are wispy in appearance and form at high altitudes. They are made up of ice crystals and are often found in fair weather. Cirrus clouds are thin, feathery and have a fibrous appearance.
Learn more about Cirrus clouds