Question 1

The typical amount of time it takes for an air mass to pass over a given area is on the order of a few:

Accepted Answer

A) minutes. 
B) weeks. 
C) hours. 
D) months. 
E) days. 
A) minutes. 
B) weeks. 
C) hours. 
D) months. 
E) days.

Question 2

The Pineapple Express is responsible for supplying most of the moisture on the east side of the Rocky Mountains.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following statements is TRUE of lake-effect snowfall?

Accepted Answer

A) Lake-effect snowfall accounts for only a small portion of seasonal snowfall along the eastern edges of the Great Lakes. 
B) Along the Great Lakes,lake-effect snowfall usually only occurs within 80 km of the leeward lake shores. 
C) Lake-effect events are not capable of generating more than a centimeter or two of snow. 
D) Lake-effect events are produced through the modification of mP air masses. 
A) Lake-effect snowfall accounts for only a small portion of seasonal snowfall along the eastern edges of the Great Lakes. 
B) Along the Great Lakes,lake-effect snowfall usually only occurs within 80 km of the leeward lake shores. 
C) Lake-effect events are not capable of generating more than a centimeter or two of snow. 
D) Lake-effect events are produced through the modification of mP air masses.

Question 4

The lower-case letter m or c is used to designate the nature of the surface in the source region and hence the humidity characteristics of the air mass.

Accepted Answer

A) True 
 B)False

Question 5

cP and cA air masses are never experienced in the southern U.S.

Accepted Answer

A) True 
 B)False

Question 6

The properties of air masses change little,even if they travel thousands of kilometers.

Accepted Answer

A) True 
 B)False

Question 7

The physical properties of an air mass are independent of its place of origin.

Accepted Answer

A) True 
 B)False

Question 8

Orographic precipitation in the western U.S.is often associated with the Pacific mP air mass.

Accepted Answer

A) True 
 B)False

Question 9

When an air mass is warmer than the surface over which it is moving:

Accepted Answer

A) the letter k is added after the air mass symbol. 
B) visibility within the air mass is usually very good. 
C) the air becomes more stable. 
D) the lapse rate in the air mass is increased. 
A) the letter k is added after the air mass symbol. 
B) visibility within the air mass is usually very good. 
C) the air becomes more stable. 
D) the lapse rate in the air mass is increased.

Question 10

The moisture content of an air mass is unrelated to its temperature.

Accepted Answer

A) True 
 B)False

Question 11

Maritime polar (mP)air masses have their greatest influence in the eastern United States.

Accepted Answer

A) True 
 B)False

Question 12

In winter,cT brings fog,drizzle,and occasional moderate precipitation to NW Mexico and the SW United States.

Accepted Answer

A) True 
 B)False

Question 13

An air mass from the Gulf of Mexico that moves northward over the U.S.in winter would be labeled:

Accepted Answer

A) cTw. 
B) mTk. 
C) mPw. 
D) cTk. 
E) mTw. 
A) cTw. 
B) mTk. 
C) mPw. 
D) cTk. 
E) mTw.

Question 14

Air masses are identified by a pair of letters,one lowercase and one uppercase.The uppercase letter (P,A,or T)refers to:

Accepted Answer

A) average air pressure within the air mass. 
B) the approximate latitude of the air mass source region. 
C) the humidity levels within the air mass. 
D) the elevation of the air mass source region. 
A) average air pressure within the air mass. 
B) the approximate latitude of the air mass source region. 
C) the humidity levels within the air mass. 
D) the elevation of the air mass source region.

Question 15

Which of these is NOT a process by which air masses are modified?

Accepted Answer

A) calm winds 
B) lifting over mountains 
C) evaporation of water 
D) cooling from below 
E) heating from below 
A) calm winds 
B) lifting over mountains 
C) evaporation of water 
D) cooling from below 
E) heating from below

Question 16

Siberian Express weather events are generally confined to Alaska and western Canada.

Accepted Answer

A) True 
 B)False

Question 17

An mP air mass is:

Accepted Answer

A) humid and cold. 
B) humid and warm. 
C) dry and warm. 
D) dry and cold. 
A) humid and cold. 
B) humid and warm. 
C) dry and warm. 
D) dry and cold.

Question 18

Lake-effect snowfall is caused by:

Accepted Answer

A) air mass modification related to the differential heating of land and water. 
B) ice crystals falling from a cP air mass on the windward side of a lake. 
C) an mP air mass passing over a cold body of water. 
D) warm air masses passing over a cold lake in the autumn. 
A) air mass modification related to the differential heating of land and water. 
B) ice crystals falling from a cP air mass on the windward side of a lake. 
C) an mP air mass passing over a cold body of water. 
D) warm air masses passing over a cold lake in the autumn.

Question 19

The mT air masses from the Gulf-Caribbean-Atlantic source region greatly affect the weather of the United States east of the Rocky Mountains.

Accepted Answer

A) True 
 B)False

Question 20

Which air mass does not usually influence weather in the United States during the summer?

Accepted Answer

A) cA 
B) cP 
C) cT 
D) mP 
A) cA 
B) cP 
C) cT 
D) mP

The typical amount of time it takes for an air mass to pass over a given area is on the order of a few:

The Pineapple Express is responsible for supplying most of the moisture on the east side of the Rocky Mountains.

Which of the following statements is TRUE of lake-effect snowfall?

The lower-case letter m or c is used to designate the nature of the surface in the source region and hence the humidity characteristics of the air mass.

cP and cA air masses are never experienced in the southern U.S.

The properties of air masses change little,even if they travel thousands of kilometers.

The physical properties of an air mass are independent of its place of origin.

Orographic precipitation in the western U.S.is often associated with the Pacific mP air mass.

When an air mass is warmer than the surface over which it is moving:

The moisture content of an air mass is unrelated to its temperature.

Maritime polar (mP)air masses have their greatest influence in the eastern United States.

In winter,cT brings fog,drizzle,and occasional moderate precipitation to NW Mexico and the SW United States.

An air mass from the Gulf of Mexico that moves northward over the U.S.in winter would be labeled:

Air masses are identified by a pair of letters,one lowercase and one uppercase.The uppercase letter (P,A,or T)refers to:

Which of these is NOT a process by which air masses are modified?

Siberian Express weather events are generally confined to Alaska and western Canada.

An mP air mass is:

Lake-effect snowfall is caused by:

The mT air masses from the Gulf-Caribbean-Atlantic source region greatly affect the weather of the United States east of the Rocky Mountains.

Which air mass does not usually influence weather in the United States during the summer?

Introduction to the Atmosphere

Heating Earths Surface and Atmosphere

Temperature

Moisture and Atmospheric Stability

Forms of Condensation and Precipitation

Air Pressure and Winds

Circulation of the Atmosphere

Weather Patterns

Thunderstorms and Tornadoes

Hurricanes

Weather Analysis and Forecasting

Air Pollution

The Changing Climate

World Climates

Optical Phenomena of the Atmosphere

Filters

Exam 8: Air Masses

The typical amount of time it takes for an air mass to pass over a given area is on the order of a few:

The Pineapple Express is responsible for supplying most of the moisture on the east side of the Rocky Mountains.

Which of the following statements is TRUE of lake-effect snowfall?

The lower-case letter m or c is used to designate the nature of the surface in the source region and hence the humidity characteristics of the air mass.

cP and cA air masses are never experienced in the southern U.S.

The properties of air masses change little,even if they travel thousands of kilometers.

The physical properties of an air mass are independent of its place of origin.

Orographic precipitation in the western U.S.is often associated with the Pacific mP air mass.

When an air mass is warmer than the surface over which it is moving:

The moisture content of an air mass is unrelated to its temperature.

Maritime polar (mP)air masses have their greatest influence in the eastern United States.

In winter,cT brings fog,drizzle,and occasional moderate precipitation to NW Mexico and the SW United States.

An air mass from the Gulf of Mexico that moves northward over the U.S.in winter would be labeled:

Air masses are identified by a pair of letters,one lowercase and one uppercase.The uppercase letter (P,A,or T)refers to:

Which of these is NOT a process by which air masses are modified?

Siberian Express weather events are generally confined to Alaska and western Canada.

An mP air mass is:

Lake-effect snowfall is caused by:

The mT air masses from the Gulf-Caribbean-Atlantic source region greatly affect the weather of the United States east of the Rocky Mountains.

Which air mass does not usually influence weather in the United States during the summer?

Introduction to the Atmosphere

Heating Earths Surface and Atmosphere

Temperature

Moisture and Atmospheric Stability

Forms of Condensation and Precipitation

Air Pressure and Winds

Circulation of the Atmosphere

Weather Patterns

Thunderstorms and Tornadoes

Hurricanes

Weather Analysis and Forecasting

Air Pollution

The Changing Climate

World Climates

Optical Phenomena of the Atmosphere

Filters