Ch.18 & 20 Test

Rain,snow, sleet, and hail are all examples of….
Precipitation
Which term describes the conversion of a solid directly to a gas, without passing through the liquid state?
Sublimation
The change of state from a gas to a liquid is called….
Condensation
Air that has reached its water-vapor capacity is aid to be….
Saturated
Which of the following is NOT a process that lifts air?
Divergence
Orographic lifting is associated with….
Mountains
Which cloud type consists of globular cloud masses with a cauliflower structure?
Cumulus
Which term is used to describe clouds of middle height?
Alto
Which cloud are often associated with thunder and lightning?
Cumulonimbus
Which type of precipitation consists of small clear-to-translucent ice particles?
Sleet
What type of cloud is associated with hail?
Cumulonimbus
Maritime air masses form…..
Over water
Which air masses have the greatest effect on weather conditions in much of the United States?
cP and mT
The boundary that separates different air masses is called a(n)…..
Front
The weather behind a cold front is dominated by which of the following?
Cold air mass
Which gas is most important fro understanding atmospheric process
Water vapor
The process by which water vapor changes directly to a solid is called…
Deposition
The ratio of air’s water vapor content to its capacity to hold water vapor at that same temperature is the….
Relative humidity
Which cloud type is best described as sheets or layers that cover much or all of the sky?
Stratus
Which cloud type is confined to the middle height range?
Alto stratus
Compared to clouds, fogs are….
At lower altitudes
Which of the following processes can produce either rain or snow?
The Bergeron process
An immense body of air characterized by similar properties at any given altitude is know as a(n)…..
Air mass
Which two properties characterize an air mass?
Temperature and moisture
Which type of air mass originates in northern Canada
cP
An mT air mass is best described as….
Warm and wet
A cT air mass is
Hot and wet
In Figre 20-1, which of the following is characteristic of the air mass labeled F
Both a and c
Which air mass is the source of much of the precipitation in the central and eastern United States?
mT
On a weather map, which type of front is shown by a line with triangular points on one side?
Cold
What type of front forms when the surface position of the front does not move?
Stationary
When an active cold front overtakes a warm front,….
An occluded front forms
Along a front, which type of air is always forced upwards?
Warmer, less dense air
What type of front usually produces several hours of light-to-moderate precipitation over a large region?
Warm front
The greatest number of thunderstorm occur in the….
Tropics
A rotating column of air is called a(n)…
Vortex
Tornadoes are most frequent from…..
April to June
Hurricanes are classified according to intensity using the….
Saffir-Simpson scale
Typhoon is another name for…..
Hurricane
What scale is used to measure tornado intensity?
Fugita Tornado Intensity Scale
What is a hurricane?
A whirling cyclone that produce winds of at least 119 kilometers/hour.
What is a storm surge?
It is a dome of water about 60 to 80 km wide that sweeps across the coast where hurricane’s eye moves onto land.
What is relative humidity?
It is the ratio of the air’s actual water vapor content compared with the amount of water vapor air can hold at the temperature and pressure.
What are the three type of clouds?
Cirrus, Stratus, Cumulus
What type of atmospheric conditions are associated with Cloud B in Figure 18-2?
Cumulus- unstable
Describe an mP air mass?
Wet and cold
Where are the heaviest rains and fastest winds of a hurricane found?
Eye wall
Describe the formation of the four types of fronts and the weather associated with each.
Warm front- light to moderate precipitation
Cold front- heavy precipitation and gusty winds
Stationary front- gentle precipitation
Occluded front- forms when an active cold front overtakes a warm front. They light precipitation.
Describe the three basic types of clouds.
Cirrus- high, white, and thin. They look like feathers
Cumulus- rounded individual cloud masses. They have flat bases and cauliflower structures.
Stratus- form sheets or layers that covers much or all of they sky.