Q. Which of the following clouds are delicate, feathery clouds that are made mostly of ice crystals?

[A] Cumulus clouds

[B] Cirrus clouds

[C] Altocumulus clouds

[D] Stratocumulus clouds

Answer: B
Notes:

All clouds are made up of basically the same thing: water droplets or ice crystals that float in the sky.  

But all clouds look a little bit different from one another, and sometimes these differences can help us predict a change in the weather. 

  • Cirrus clouds are delicate, feathery clouds that are made mostly of ice crystals. Their wispy shape comes from wind currents which twist and spread the ice crystals into strands. 
  • Altocumulus clouds have several patchy white or gray layers, and seem to be made up of many small rows of fluffy ripples. They are lower than cirrus clouds, but still quite high. They are made of liquid water, but they don’t often produce rain. 
  • Cumulus clouds look like fluffy, white cotton balls in the sky. They are beautiful in sunsets, and their varying sizes and shapes can make them fun to observe! 
  • Stratocumulus clouds are patchy gray or white clouds that often have a dark honeycomb-like appearance. 

Source: NCERT XI Fundamentals of Physical geography and G C Leong