Question 1

On the weather map below, describe the wind pattern and the relationship between the winds and isobars.

Accepted Answer

The winds are blowing away from the high pressure center and toward the low pressure center. Winds are strongest near the center of the low, where the isobars are most closely spaced. The winds are all deflected with respect to the isobars due to near surface friction between the moving air and the ground surface, otherwise the winds would be parallel to the isobars due to Coriolis forces.

Question 2

When are upper air winds fastest?

Accepted Answer

A)   in summer
B)   in winter
C)   whenever the temperature gradient is weak
D)   These winds maintain roughly the same speeds throughout the year.E) A) and D)
F) None of the above B

Question 3

If Earth were_____  , there would be no Coriolis force.

Accepted Answer

A)   cooler
B)   not rotating
C)   more humid
D)   closer to the sunE) A) and D)
F) A) and C)

Question 4

When someone says we have a southeast wind, what direction would you look to face into the wind?

Accepted Answer

A)   east
B)   west
C)   northwest
D)   southeastE) All of the above
F) A) and C) D

Question 5

Two weather stations record air pressure. Weather station 1 is 100km north of weather station 2. The pressure at station 1 is 1023mb and at station 2 it is 1015mb. What is the pressure gradient between the two stations?

Accepted Answer

A)   0.18 mb/km
B)   0.08 mb/km
C)   0.04 mb/km
D)   0.02 mb/kmE) A) and B)
F) A) and C)

Question 6

Which of these instruments is not used to measure air pressure?

Accepted Answer

A)   anemometer
B)   mercurial barometer
C)   aneroid barometer
D)   barographE) C) and D)
F) B) and C)

Question 7

In the Northern Hemisphere, winds associated with a high pressure system blow_____ .

Accepted Answer

A)   clockwise and outward from the center
B)   clockwise and toward the center
C)   counterclockwise and toward the center
D)   counterclockwise and outward from the centerE) A) and B)
F) A) and C)

Question 8

Why do storm systems move from west to east in mid latitudes of the Northern Hemisphere?

Accepted Answer

A)   The storms are steered by approximately west to east winds aloft that are approximately geostrophic winds produced by Coriolis forces.
B)   The prevailing wind is from the east, and the storm systems move toward the surface flow.
C)   The prevailing wind is from the west.
D)   The continents break up air flow that would normally be south to north and the Coriolis force turns the storms to the right, or toward the east.E) A) and D)
F) A) and C)

Question 9

Which state might you expect to have the most variable wind direction patterns? For example, sometimes wind coming from the west and sometimes from the east, indicating proximity to a directional change zone.

Accepted Answer

A)   Kansas
B)   Florida
C)   Ohio
D)   ColoradoE) A) and B)
F) B) and C)

Question 10

Upper air winds are generally _____ than the surface winds directly below.

Accepted Answer

A)   faster
B)   fluctuating in comparison to
C)   about the same speed as
D)   slowerE) A) and B)
F) A) and C)

Question 11

What type of local wind pattern is illustrated in the diagram below?

Accepted Answer

The answer of What type of local wind pattern is...

Question 12

What is the Southern Oscillation?

Accepted Answer

A)   the 10- year cycle in winter storm activity in the temperate zone of the Southern Hemisphere
B)   the intermittent switch from El Niño to La Niña conditions in the equatorial Pacific
C)   the periodic intense cyclonic storms from Antarctica
D)   the weather pattern that changes tropical cyclone activity in the southern oceanE) A) and D)
F) A) and C)

Question 13

High air pressure systems are usually associated with _____  .

Accepted Answer

A)   diverging winds
B)   clear weather
C)   descending air
D)   all of theseE) A) and D)
F) B) and C)

Question 14

In the Northern Hemisphere, winds blow_____  and _____  from the center of anticyclones.

Accepted Answer

A)   counter- clockwise, outward
B)   counter- clockwise, inward
C)   clockwise, outward
D)   clockwise; inwardE) None of the above
F) B) and D)

Question 15

Another name for the area low pressure in the equatorial region is the_____  .

Accepted Answer

A)   horse latitudes
B)   westerlies
C)   subpolar easterlies
D)   doldrumsE) A) and B)
F) B) and D)

Question 16

Isobars are lines on a weather map representing what?

Accepted Answer

A)   lines showing equal density of bars
B)   lines of equivalent air speed
C)   lines of equal elevation for the tropopause
D)   lines of equal air pressureE) A) and C)
F) A) and B)

Question 17

If "fair" weather were approaching, the pressure tendency would probably be _____ .

Accepted Answer

A)   rising
B)   steady
C)   falling
D)   none of theseE) All of the above
F) A) and B)

Question 18

If you live on the east coast of Florida or the Gulf Coast, why might you hope for an El Niño year?

Accepted Answer

A)   It will decrease the chances of heavy summer thunderstorms and floods.
B)   It will produce a warmer summer, but with less rain than normal.
C)   It will decrease the probability of tropical cyclones.
D)   It will bring clear, cool summer conditions, albeit dry.E) A) and B)
F) A) and C)

Question 19

Widely spaced isobars often indicate _____ .

Accepted Answer

A)   variable winds
B)   light winds
C)   cyclonic winds
D)   high windsE) C) and D)
F) All of the above

Question 20

Consider the below diagram:  What does the diagram show?

Accepted Answer

A)   More commonly the wind blows from the Northwest.
B)   The wind often blows to the North, but is very gentle when it does so.
C)   The dominant wind direction is from the Southeast.
D)   The wind is always blowing in the same direction in Australia.E) A) and B)
F) A) and C)

Exam 18: Air Pressure and Wind

On the weather map below, describe the wind pattern and the relationship between the winds and isobars.

When are upper air winds fastest?

Correct Answer
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B

If Earth were_____ , there would be no Coriolis force.

Correct Answer
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When someone says we have a southeast wind, what direction would you look to face into the wind?

Correct Answer
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D

Two weather stations record air pressure. Weather station 1 is 100km north of weather station 2. The pressure at station 1 is 1023mb and at station 2 it is 1015mb. What is the pressure gradient between the two stations?

Correct Answer
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Which of these instruments is not used to measure air pressure?

Correct Answer
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In the Northern Hemisphere, winds associated with a high pressure system blow_____ .

Correct Answer
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Why do storm systems move from west to east in mid latitudes of the Northern Hemisphere?

Correct Answer
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Which state might you expect to have the most variable wind direction patterns? For example, sometimes wind coming from the west and sometimes from the east, indicating proximity to a directional change zone.

Correct Answer
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Upper air winds are generally _____ than the surface winds directly below.

Correct Answer
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What type of local wind pattern is illustrated in the diagram below?

Correct Answer
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What is the Southern Oscillation?

Correct Answer
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High air pressure systems are usually associated with _____ .

Correct Answer
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In the Northern Hemisphere, winds blow_ and _ from the center of anticyclones.

Correct Answer
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Another name for the area low pressure in the equatorial region is the_____ .

Correct Answer
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Isobars are lines on a weather map representing what?

Correct Answer
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If "fair" weather were approaching, the pressure tendency would probably be _____ .

Correct Answer
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If you live on the east coast of Florida or the Gulf Coast, why might you hope for an El Niño year?

Correct Answer
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Widely spaced isobars often indicate _____ .

Correct Answer
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Consider the below diagram: What does the diagram show?

Correct Answer
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Exam 18: Air Pressure and Wind

On the weather map below, describe the wind pattern and the relationship between the winds and isobars.

When are upper air winds fastest?

Correct AnswerverifiedB

If Earth were_____ , there would be no Coriolis force.

Correct AnswerverifiedShow Answer

When someone says we have a southeast wind, what direction would you look to face into the wind?

Correct AnswerverifiedD

Two weather stations record air pressure. Weather station 1 is 100km north of weather station 2. The pressure at station 1 is 1023mb and at station 2 it is 1015mb. What is the pressure gradient between the two stations?

Correct AnswerverifiedShow Answer

Which of these instruments is not used to measure air pressure?

Correct AnswerverifiedShow Answer

In the Northern Hemisphere, winds associated with a high pressure system blow_____ .

Correct AnswerverifiedShow Answer

Why do storm systems move from west to east in mid latitudes of the Northern Hemisphere?

Correct AnswerverifiedShow Answer

Which state might you expect to have the most variable wind direction patterns? For example, sometimes wind coming from the west and sometimes from the east, indicating proximity to a directional change zone.

Correct AnswerverifiedShow Answer

Upper air winds are generally _____ than the surface winds directly below.

Correct AnswerverifiedShow Answer

What type of local wind pattern is illustrated in the diagram below?

Correct AnswerverifiedShow Answer

What is the Southern Oscillation?

Correct AnswerverifiedShow Answer

High air pressure systems are usually associated with _____ .

Correct AnswerverifiedShow Answer

In the Northern Hemisphere, winds blow_____ and _____ from the center of anticyclones.

Correct AnswerverifiedShow Answer

Another name for the area low pressure in the equatorial region is the_____ .

Correct AnswerverifiedShow Answer

Isobars are lines on a weather map representing what?

Correct AnswerverifiedShow Answer

If "fair" weather were approaching, the pressure tendency would probably be _____ .

Correct AnswerverifiedShow Answer

If you live on the east coast of Florida or the Gulf Coast, why might you hope for an El Niño year?

Correct AnswerverifiedShow Answer

Widely spaced isobars often indicate _____ .

Correct AnswerverifiedShow Answer

Consider the below diagram: What does the diagram show?

Correct AnswerverifiedShow Answer

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B

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D

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In the Northern Hemisphere, winds blow_ and _ from the center of anticyclones.

Correct Answer
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