Which term best describes clouds that cover the sky like a blanket?

The term that best describes clouds that cover the sky like a blanket is "stratus." Stratus clouds are typically uniform in appearance, presenting a gray or white layer that can obscure the sun and create overcast conditions. They often appear at low altitudes and can lead to light precipitation, making them quite distinct in their characteristic appearance.

In contrast, cumulus clouds are puffy and white, resembling cotton balls, and generally indicate fair weather when they are isolated. Nimbus refers to clouds that are associated with precipitation, but it is not a standalone cloud type (commonly seen as part of the term "nimbostratus"), denoting rain clouds. Cirrus clouds, on the other hand, are high-altitude wispy clouds that are thin and often indicate fair weather, although they can signal a change in the weather.

Understanding the specific characteristics of these cloud types helps in weather prediction and enhances comprehension of atmospheric phenomena.