Which of the following is not included in the high clouds ?

Question

Accepted Answer

Option 3, Strato-Cumulus, is the correct answer because it is not classified as a high cloud. High clouds are typically found at altitudes above 20,000 feet (6,000 meters) and are composed primarily of ice crystals due to the cold temperatures at those heights. They are generally thin and wispy, allowing sunlight to pass through them.

1. **Explanation for Option 3 (Strato-Cumulus):**
   - Strato-Cumulus clouds are low-level clouds that form below 6,500 feet (2,000 meters). They are characterized by their large, dark, rounded masses, often covering the entire sky in a continuous layer. Unlike high clouds, Strato-Cumulus clouds are composed mainly of water droplets and are associated with overcast weather, rather than the thin, icy appearance of high clouds.

2. **Explanation for why other options are incorrect:**
   - **Option 1 (Cirrus):** Cirrus clouds are high clouds that form above 20,000 feet. They are thin, wispy clouds composed of ice crystals and are often seen in fair weather. Their high altitude and ice crystal composition classify them as high clouds.
   - **Option 2 (Cirro-Stratus):** Cirro-Stratus clouds are also high clouds, forming at altitudes above 20,000 feet. They are thin, sheet-like clouds that cover the sky and can create halos around the sun or moon. Their high altitude and ice crystal composition make them part of the high cloud category.
   - **Option 4 (Cirro-Cumulus):** Cirro-Cumulus clouds are high clouds that appear as small, white patches often arranged in rows at high altitudes. They are composed of ice crystals and are part of the high cloud family due to their altitude and composition.

In summary, Strato-Cumulus clouds are not included in the high clouds category because they form at much lower altitudes and have different characteristics compared to the high clouds like Cirrus, Cirro-Stratus, and Cirro-Cumulus.