Exam 5: Condensation Dew Fog and Clouds

The dew point is the temperature at which

As the air cools during the night,the relative humidity increases.When the relative humidity reaches about 75 percent,condensation may begin on the most active hygroscopic nuclei,producing a ____________________ haze.​

Jet aircraft flying at high altitudes often produce a cirrus-like trail of condensed vapor called a condensation trail or ____________________.

Upslope fog forms because air ____ as it flows up a hill or mountain range.

Dew is most likely to form on

Mammatus clouds most frequently form on the underside of ____ clouds.

In Howard's cloud classification system sheetlike clouds were named ____ ("layer");a puffy cloud ____ ("heap");a wispy cloud ____ ("curl of hair");and a rain cloud ____ ("violent rain").

In 1803,Luke Howard,an English naturalist,developed a cloud classification system that employed ____ words to describe clouds as they appear to a ground observer.

In modern satellites,a special type of advanced radiometer (called a(n)____________________)provides satellite images with much better resolution than was available in the past.

List the main types of fog,and then briefly explain how each one forms.Where might you expect each of these different types of fog to form?

High cirriform clouds are composed almost entirely of ice crystals.In tropical regions,air temperatures low enough to freeze all liquid water usually occur only above 6000 m (about 20,000 ft).In polar regions,however,these same temperatures may be found at altitudes as low as 3000 m (about 10,000 ft).Hence,while you may observe cirrus clouds at 3600 m (about 12,000 ft)over northern Alaska,you will not see them at that elevation above southern Florida.

The process of water vapor changing directly to ice without becoming a liquid first is called ____________________.

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

Because fog causes a lot of problems,such as accidents,scientists are seeking ways to disperse,or at least "thin" fog.

Frost forms when the dew point temperature is at or below freezing.

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

On a cold morning,it is possible to see your breath even if the air temperature is above freezing.

Cirrus clouds are composed primarily of

In 1802,the French naturalist ____________________ proposed the first system for classifying clouds.

You are sitting inside your house on a sunny afternoon.The shades are drawn and you look at the window and notice the Sun disappears for about 10 seconds.The alternate light and dark period lasts for nearly 30 minutes.The clouds passing in front of the Sun are ____________________ clouds.