Question 1

What is an air mass?

Accepted Answer

A large section of the troposphere with uniform properties of temperature and moisture

Answer

A region of high pressure

Answer

A small section of the atmosphere with varying properties of temperature and moisture

Answer

A layer of clouds formed by rising warm air

Question 2

What determines the properties of an air mass?

Accepted Answer

The surface over which it forms

Answer

The speed at which it moves

Answer

The altitude at which it forms

Answer

The pressure gradient

Question 3

What type of air mass is formed over large bodies of water?

Accepted Answer

Maritime air

Answer

Polar air

Answer

Arctic air

Answer

Continental air

Question 4

Which of the following is NOT a main source region of air masses in North America?

Accepted Answer

Equatorial Region

Answer

Arctic Region

Answer

Tropical Region

Answer

Polar Region

Question 5

What are the three main factors that determine the weather in an air mass?

Accepted Answer

Moisture content, cooling process, and stability

Answer

Temperature, pressure, and wind speed

Answer

Cloud type, precipitation, and visibility

Answer

Latitude, altitude, and pressure

Question 6

What type of weather is associated with maritime air masses?

Accepted Answer

Cloud, precipitation, and fog

Answer

Strong winds and turbulence

Answer

High pressure and calm weather

Answer

Clear skies and dry conditions

Question 7

Which of the following is NOT a cooling process that contributes to cloud formation?

Accepted Answer

Compression due to sinking air

Answer

Contact with a surface cooling by radiation

Answer

Expansion brought about by lifting

Answer

Advection over a colder surface

Question 8

What happens when Continental Arctic air moves over open water?

Accepted Answer

It becomes warmer and moist

Answer

It becomes warmer and drier

Answer

It becomes colder and drier

Answer

It remains unchanged

Question 9

How does warming from below affect the stability of an air mass?

Accepted Answer

It makes the air mass unstable

Answer

It causes the air mass to dissipate

Answer

It makes the air mass more stable

Answer

It has no effect on stability

Question 10

What is a front?

Accepted Answer

A boundary between two air masses

Answer

A zone of low pressure

Answer

A region of high pressure

Answer

A layer of clouds formed by rising warm air

Question 11

What is the polar front?

Accepted Answer

The transition zone between polar and tropical air masses

Answer

The area of high pressure in the polar region

Answer

The boundary between Arctic and Polar air masses

Answer

The leading edge of a cold front

Question 12

What is a frontal wave?

Accepted Answer

A disturbance along the polar front where warm air bulges northward and cold air bulges southward.

Answer

A line of thunderstorms ahead of a cold front.

Answer

A wave of precipitation along a front.

Answer

A stationary front that dissipates over time.

Question 13

What is the warm sector?

Accepted Answer

The area of warm air within the bulge of the polar front.

Answer

The area of cold air behind a cold front.

Answer

The transition zone between two air masses.

Answer

The area of high pressure in a frontal system.

Question 14

What is a warm front?

Accepted Answer

A front where warm air advances on retreating cold air, ascending over it in a gentle slope.

Answer

A front where a cold front overtakes a warm front.

Answer

A front where cold air overtakes warm air, undercutting it violently.

Answer

A front where neither air mass is advancing or retreating.

Question 15

What is an occluded front?

Accepted Answer

A front where a cold front overtakes a warm front, lifting the warm sector entirely from the ground.

Answer

A front where cold air overtakes warm air, undercutting it violently.

Answer

A front where warm air advances on retreating cold air.

Answer

A front where neither air mass is advancing or retreating.

Question 16

What determines the weather at a cold front?

Accepted Answer

The moisture content and stability of the warm air mass being undercut.

Answer

The speed of the warm air mass.

Answer

The altitude of the cold air mass.

Answer

The pressure gradient between the two air masses.

Question 17

What is a squall line?

Accepted Answer

A long line of squalls and thunderstorms ahead of a fast-moving cold front.

Answer

A stationary front with no movement.

Answer

A region of high pressure.

Answer

A warm front with embedded thunderstorms.

Question 18

What type of precipitation is common in winter warm fronts?

Accepted Answer

Freezing rain, ice pellets, and snow

Answer

Hail and thunderstorms

Answer

Heavy rain and hail

Answer

Drizzle and fog

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