Question 1

Downdrafts totally dominate the_____ of an air mass thunderstorm.

Accepted Answer

A)   cumulus stage
B)   dissipating stage
C)   mature stageD) All of the above
E) A) and B)

Question 2

Conventional radar measures:

Accepted Answer

A)   raindrop and snowflake motion.
B)   cloud droplet numbers.
C)   raindrop size.
D)   raindrop motion.
E)   rainfall intensity.F) D) and E)
G) C) and D)

Question 3

Why is very humid air near the surface a necessary ingredient for severe thunderstorms?

Accepted Answer

A)   High humidity strengthens the cold front.
B)   High humidity makes the rising air cool more rapidly.
C)   Lapse rates are larger in humid air.
D)   High humidity makes the air more dense.
E)   More latent heat is then available as energy for the storm.F) A) and B)
G) A) and C)

Question 4

Thunderstorms form when________-- , humid air rises in a(n) __________ environment.

Accepted Answer

A)   cold; stable
B)   warm; unstable
C)   warm; stable
D)   cold; unstableE) B) and C)
F) A) and D)

Question 5

In the development of a thunderstorm, sharp and cool gusts beginning at the surface are characteristic in the___________ .

Accepted Answer

A)   dissipating stage
B)   cumulus stage
C)   mature stageD) None of the above
E) All of the above

Question 6

A long lightning flash at some distance from the observer produces the thunder we hear as a rumble.

Accepted Answer

A) True 
 B)False

Question 7

Some of the most dangerous weather is produced by a type of thunderstorm called a(n) :

Accepted Answer

A)   gust front.
B)   supercell.
C)   roll cloud.
D)   updraft.E) A) and B)
F) None of the above

Question 8

A dryline generally forms between which two air masses?

Accepted Answer

A)   cT and mT
B)   mP and mT
C)   cP and mT
D)   cP and cTE) A) and B)
F) C) and D)

Question 9

At any given time, about how many thunderstorms are in progress on Earth?

Accepted Answer

A)   45
B)   45,00
C)   500
D)   2,000E) A) and D)
F) C) and D)

Question 10

In the United States, a mesoscale convective complex is most likely to develop in:

Accepted Answer

A)   the Gulf of Mexico.
B)   the Pacific Northwest.
C)   the Great Plains.
D)   New England.E) None of the above
F) B) and C)

Question 11

Mesoscale convective complexes:

Accepted Answer

A)   occur along dry lines.
B)   begin as air mass thunderstorms that form in the afternoon.
C)   do not provide any benefit to agriculture.
D)   tend to die out as soon as the sun goes down.E) C) and D)
F) A) and B)

Question 12

Why is a convergent pattern of surface winds sometimes associated with thunderstorm formation?

Accepted Answer

Surface convergence ...

Question 13

Drylines are capable of producing thunderstorms because:

Accepted Answer

A)   there is an abrupt change in temperature across the dryline.
B)   the dry air mass forces the moist air mass to rise.
C)   the moist air mass lifts the dry air mass.
D)   the dry air mass is unstable and rising.E) A) and B)
F) A) and C)

Question 14

The Enhanced Fujita scale is based on:

Accepted Answer

A)   the pressure gradient across the diameter of a tornado.
B)   the measured wind speeds inside a tornado.
C)   the level of damage caused by a tornado.
D)   the frequency of lightning strikes concurrent with the tornado.E) None of the above
F) A) and B)

Question 15

Cloud- to- ground lightning results in a flow of electrons from the ground to the cloud.

Accepted Answer

A) True 
 B)False

Question 16

What is the primary source of heat that keeps a thunderstorm cloud buoyant so that it can grow so tall?

Accepted Answer

Latent heat released...

Question 17

A developing tornado is called a funnel cloud until it makes contact with the surface.

Accepted Answer

A) True 
 B)False

Question 18

Of the following states, which is struck by the largest number of tornadoes?

Accepted Answer

A)   North Carolina
B)   Oklahoma
C)   Ohio
D)   North Dakota
E)   New MexicoF) C) and D)
G) All of the above

Question 19

A microburst is:

Accepted Answer

A)   a brief, intense explosion of lightning.
B)   rarely damaging.
C)   associated only with tornadic thunderstorm cells.
D)   another name for a downburst.E) A) and B)
F) A) and C)

Question 20

A tornado is a small, very intense example of the:

Accepted Answer

A)   jet stream.
B)   Coriolis effect.
C)   cyclone.
D)   anticyclone.
E)   geostrophic wind.F) A) and C)
G) A) and B)

Exam 10: Thunderstorms and Tornadoes

A long lightning flash at some distance from the observer produces the thunder we hear as a rumble.

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Of the following states, which is struck by the largest number of tornadoes?

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A microburst is:

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A dryline generally forms between which two air masses?

Correct AnswerverifiedShow Answer

Cloud- to- ground lightning results in a flow of electrons from the ground to the cloud.

Correct AnswerverifiedShow Answer

In the development of a thunderstorm, sharp and cool gusts beginning at the surface are characteristic in the___________ .

Correct AnswerverifiedShow Answer

Thunderstorms form when________-- , humid air rises in a(n) __________ environment.

Correct AnswerverifiedShow Answer

A tornado is a small, very intense example of the:

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Why is a convergent pattern of surface winds sometimes associated with thunderstorm formation?

Correct AnswerverifiedSurface convergence ...View AnswerShow Answer

Mesoscale convective complexes:

Correct AnswerverifiedShow Answer

The Enhanced Fujita scale is based on:

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Conventional radar measures:

Correct AnswerverifiedShow Answer

Why is very humid air near the surface a necessary ingredient for severe thunderstorms?

Correct AnswerverifiedShow Answer

Drylines are capable of producing thunderstorms because:

Correct AnswerverifiedShow Answer

In the United States, a mesoscale convective complex is most likely to develop in:

Correct AnswerverifiedShow Answer

What is the primary source of heat that keeps a thunderstorm cloud buoyant so that it can grow so tall?

Correct AnswerverifiedLatent heat released...View AnswerShow Answer

A developing tornado is called a funnel cloud until it makes contact with the surface.

Correct AnswerverifiedShow Answer

At any given time, about how many thunderstorms are in progress on Earth?

Correct AnswerverifiedShow Answer

Some of the most dangerous weather is produced by a type of thunderstorm called a(n) :

Correct AnswerverifiedShow Answer

Downdrafts totally dominate the_____ of an air mass thunderstorm.

Correct AnswerverifiedShow Answer

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Thunderstorms form when-- , humid air rises in a(n) __ environment.

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Surface convergence ...
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Latent heat released...
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