Exam 5: Condensation: Dew, Fog, and Clouds

Fog is often described as a cloud that forms at ground level. In what ways are the formation of fog and clouds similar and different?

Which cloud forms in descending air?

A dim, "watery" Sun visible through a gray sheet-like cloud layer is often a good indication of ____ clouds.

The sky is overcast, and it is raining. The cloud above you is a cumulus humilis cloud.

In 1887, Ralph Abercromby and Hugo Hildebrandsson expanded Howard's original cloud classification system and published a classification system that, with only slight modification, is still in use today. In their system, ____ principal cloud forms are divided into ____ primary cloud groups.

Near the shore of an extremely large lake, steam fog is more likely to form during the ____ and advection fog in early ____.

Frost typically forms on the inside of a windowpane (rather than the outside)because ____.

Dew is most likely to form on

As Apollo 12 ascended into the atmosphere, the height of the surrounding clouds was noted to be 42,000 feet. A lightning strike was seen within these clouds, indicating that they must have been ____.

Identify the types of fog most common in different parts of the United States and Canada, as well as describing the environmental factors contributing to this particular phenomenon.

A low, lumpy cloud layer that appears in rows, patches, or rounded masses would be classified as ____.

Oils, gasoline, and paraffins are examples of ____________________ nuclei.

The cooling of the ground to produce dew is mainly the result of ____.

The condensation nuclei most favorable for producing clouds (called cloud condensation nuclei )have radii of ____________________ micrometers or more.

Steam fog poses a threat to humans with respiratory problems.

In Ralph Abercromby's and Hugo Hildebrandsson's cloud classification system, each of the four primary cloud groups is identified by the type of precipitation it produces.

All clouds form in rising air.

Which cloud type is composed of ice crystals and can cause a halo to form around the Sun or Moon?

Condensation nuclei are important in the atmosphere because ____.

In infrared-enhanced images, clouds with the coldest (highest)tops are typically assigned the colors ____ or ____.