Chatper 18 & 20 test

Rain,snow,sleet,and hail are all examples of _______
Which term describes the conversion of a solid directly to a gas, without passing through the liquid state ?
The change of state from a gas to a liquid is called ______.
Air that has reached is water-vapor capacity is said to be ______.
Which of the following is NOT a process that lifts air ?
Orographic lifting is associated with ______
Which cloud type consists of globular cloud masses with a cauliflower structure ?
Which term is used to describe clouds of middle height ?
Which clouds are often associated with thunder and lighting ?
Which type of precipitation consists of small clear-to-translucent ice particles ?
What type of cloud is associated with hail ?
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) _____
The weather behind a cold front is dominated by which of the following ?
Cold air mass
Which gas is most important for understanding atmosphere profit ?
Water vapor
The process by which water vapor changes directly to a solid is called
The ratio of air’s water-vapor content to its capacity to hold water vapor at the same temperature is the _____.
Relative Humidity
Which cloud type is best described as sheets or layers that cover much or all of the sky ?
Which cloud type is confined to the middle height range ?
Compared to clouds,fogs are _____.

at low altitudes
Which of the following processes can produces either rain or snow ?
the Bergeron process
An immense body of air characterized by similar properties at any given altitudes is known as a(n) ______.
Air mass
Which two properties characterize an air mass ?
temperature and moisture
Which type of air mass originates in northern Canada ?
An mT mass is best described as ______.
warm and wet
A cT air mass is ______.
hot and dry
In figure 20-1 , which of the following is characteristic of the air is
hot in the summer & cold in the winter
Which air mass is the source of much of the precipitation in the central and eastern united states ?
On a weather map , which type of front is shown by a line with triangular points on one side ?
What type of front forms when the surface position of the front does not move ?
When an active cold front overtakes a warm front, _______.

a occluded front forms
Alone a front, which type of air is always forced upward ?
warmer, less dense air
What type of front usually produces several hours of light-to-moderate precipitation ?
warm front
The greatest number of thunderstorms occurs in the _______.
Middles latitudes
A rotating column of air is called a(n) ____.
Tornadoes are the most frequent from _____.
April to June
Hurricanes are classified according to intensity using the ______.
Saffir-Simpson scale
Typhoon is another name for _____.
What scale is used to measure tornado intensity ?
Fugita Tornada Intensity Scale
What is a Hurricane
A whirling cyclone that produce winds of at least 119 kilometer/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 move 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 basic clouds forms ?
What type of atmosphere condition are associated with Cloud B in figure 18-1
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- light to moderate precipitation Cold front- heavy precipation and gusty windsStationary front – forms when active cold front overtakes a warm front. They light precipitation
Describe the 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 layer that covers much or all of the sky.