Question

Which descriptions refer to cirrus clouds? Check all that apply.

Answer 1

The right options are;  

are wispy

form at high altitudes

form from ice crystals

Cirrus clouds are principal high level cloud type that are characterized by white, delicate filaments or wisps of white parches.  Cirrus clouds are usually found at an altitude of above 20,000feet and they are formed from ice crystals because at high altitudes, temperatures are usually below freezing.

Answer 2

Cirrus clouds:

Wispy
Form at high altitudes
Form from ice crystals