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Stratus

The cloud form that is best described as sheets or layers that cover much or all of the sky

Cumlus

The cloud form that consists of globular cloud masses that take on a billowy or "cauliflower-like" structure

Alto

This term is used to describe clouds found in the middle height range

Cirrus

High clouds that form delicate veil-like patches or extended wispy fibers

Nimbo

This term is used to describe clouds that produce precipitation.

Cumulus

These clouds are often called "fair weather" clouds

Cirrostratus

A halo around the Sun or Moon indicates that this cloud type is present

Advection

When warm moist air moves over a cold surface this fog may result

Upslope

This fog results from adiabatic cooling

Steam

Which one of the fogs listed below may be categorized as an evaporation fog

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