Identify the correct statement about cirrus and cumulus clouds — UPSC Prelims...

Which one of the following statements is correct?

1. Cirrus clouds are composed of ice crystals.
2. Cirrus clouds exhibit a flat base and have the appearance of rising domes.
3. Cumulus clouds are white and thin, and form delicate patches and give a fibrous and feathery appearance.
4. Cumulus clouds are classified as high clouds.

Explanation

Option (a) is the correct answer

• Cirrus clouds are high-altitude clouds that form above 20,000 feet and are composed mainly of ice crystals, giving them a thin, wispy, and feathery appearance. Therefore, the option describing high, delicate clouds made of ice crystals correctly refers to cirrus clouds. The option describing puffy, cotton-like clouds relates to cumulus clouds, not cirrus. Another option incorrectly attributes the characteristics of cirrus clouds to cumulus clouds. The remaining option is also incorrect because cumulus clouds generally develop at low to middle altitudes rather than at high altitudes.

Answer: (a) Cirrus clouds are composed of ice crystals.