Question 1

The overall strength of a circulation system is determined by:

Accepted Answer

A)   the latitude.
B)   its pressure gradient.
C)   no one factor is more important than the others.
D)   air temperature.
E)   friction between the ground and the air.

Question 2

If "fair" weather is approaching, the pressure tendency would probably be:

Accepted Answer

A)   steady.
B)   rising.
C)   falling.
D)   Pressure tendency has nothing to do with forecasting good or bad weather.

Question 3

The Coriolis effect occurs because of this characteristic of the earth:

Accepted Answer

A)   its atmosphere.
B)   its rotation.
C)   its dense core.
D)   its magnetic field.

Question 4

A steep pressure gradient:

Accepted Answer

A)   is only possible in the tropics.
B)   produces light winds.
C)   would be depicted by widely spaced isobars.
D)   produces strong winds.

Question 5

The wind speed normally increases with height in the layer of air next to the ground. This illustrates the fact that:

Accepted Answer

A)   density decreases with height.
B)   friction is present only close to the ground.
C)   pressure decreases with height.
D)   the lowest part of the atmosphere is turbulent.
E)   temperature decreases with height.

Question 6

You would expect vertical airflow in a cyclone to result in:

Accepted Answer

A)   convergence aloft.
B)   divergence aloft.
C)   no cloud development.
D)   divergence at the surface.

Question 7

How does friction act to change the direction of the wind near the earth's surface?

Accepted Answer

Friction reduces the...

Question 8

With respect to the Coriolis force, which association is NOT correct?

Accepted Answer

A)   deflection - always at a 90 degree angle to the direction of air flow
B)   North Pole - strongest deflection
C)   Northern Hemisphere - deflection to the right of the wind's original direction
D)   Low wind speeds - strongest deflection

Question 9

A wind direction of 270 degrees means that the wind is blowing from the southeast.

Accepted Answer

A) True 
 B)False

Question 10

_______are elongated high pressure areas extending towards the poles and are associated with_______ .

Accepted Answer

A)   troughs; warm, dry air
B)   ridges; cool, wet weather
C)   troughs; cool, wet weather
D)   ridges; warm, dry air

Question 11

The sea breeze is a simple thermal circulation that does not involve a pressure gradient.

Accepted Answer

A) True 
 B)False

Question 12

Horizontal variations in air pressure cause a force which makes the wind blow. These pressure variations are often caused by:

Accepted Answer

A)   warm temperatures in the stratosphere.
B)   Earth's rotation.
C)   non- circular shape of Earth.
D)   greenhouse effect.
E)   uneven heating of the earth's surface.

Question 13

In the northern hemisphere, cyclonic winds flow:

Accepted Answer

A)   outward and counterclockwise.
B)   inward and counterclockwise.
C)   inward and clockwise.
D)   outward and clockwise.

Question 14

What is a limitation of an altimeter that pilots must account for?

Accepted Answer

A)   It has a low battery life at high altitudes.
B)   Its readings may be too low or too high if the temperature varies from the expected.
C)   They can't ever be used to determine altitude - only pressure.
D)   Corrections are not as accurate at low levels as they are at higher levels.

Question 15

The horizontal movement of air is called______ .

Accepted Answer

The answer of The horizontal movement of air is called______...

Question 16

Explain why winds aloft flow roughly parallel to the isobars, while surface winds travel at an angle across the isobars.

Accepted Answer

In both cases, pressure gradient force d...

Question 17

The National Weather Service measures air pressure in the unit of a millibar, which is equivalent to:

Accepted Answer

A)   500 Newtons per square meter.
B)   10 Newtons per square meter.
C)   1000 Newtons per square meter.
D)   100 Newtons per square meter.

Question 18

Neglecting friction, the speed and direction of the horizontal wind are determined by:

Accepted Answer

A)   pressure gradient and Coriolis.
B)   only gravity.
C)   viscosity and turbulence.
D)   gravity and humidity.
E)   temperature and humidity.

Question 19

If you want to locate the centers of high and low pressure systems, you will need a map that has:

Accepted Answer

A)   isodrosotherms.
B)   contour lines.
C)   isotherms.
D)   isobars.

Question 20

Which of the following has the smallest impact on winds?

Accepted Answer

A)   friction
B)   Coriolis effect
C)   pressure gradient force
D)   humidity

Exam 6: Air Pressure and Winds

A steep pressure gradient:

Correct AnswerverifiedShow Answer

If you want to locate the centers of high and low pressure systems, you will need a map that has:

Correct AnswerverifiedShow Answer

In the northern hemisphere, cyclonic winds flow:

Correct AnswerverifiedShow Answer

Horizontal variations in air pressure cause a force which makes the wind blow. These pressure variations are often caused by:

Correct AnswerverifiedShow Answer

The National Weather Service measures air pressure in the unit of a millibar, which is equivalent to:

Correct AnswerverifiedShow Answer

Neglecting friction, the speed and direction of the horizontal wind are determined by:

Correct AnswerverifiedShow Answer

If "fair" weather is approaching, the pressure tendency would probably be:

Correct AnswerverifiedShow Answer

Which of the following has the smallest impact on winds?

Correct AnswerverifiedShow Answer

You would expect vertical airflow in a cyclone to result in:

Correct AnswerverifiedShow Answer

Explain why winds aloft flow roughly parallel to the isobars, while surface winds travel at an angle across the isobars.

Correct AnswerverifiedIn both cases, pressure gradient force d...View AnswerShow Answer

The horizontal movement of air is called______ .

Correct AnswerverifiedShow Answer

The overall strength of a circulation system is determined by:

Correct AnswerverifiedShow Answer

The wind speed normally increases with height in the layer of air next to the ground. This illustrates the fact that:

Correct AnswerverifiedShow Answer

What is a limitation of an altimeter that pilots must account for?

Correct AnswerverifiedShow Answer

The Coriolis effect occurs because of this characteristic of the earth:

Correct AnswerverifiedShow Answer

_______are elongated high pressure areas extending towards the poles and are associated with_______ .

Correct AnswerverifiedShow Answer

A wind direction of 270 degrees means that the wind is blowing from the southeast.

Correct AnswerverifiedShow Answer

With respect to the Coriolis force, which association is NOT correct?

Correct AnswerverifiedShow Answer

How does friction act to change the direction of the wind near the earth's surface?

Correct AnswerverifiedFriction reduces the...View AnswerShow Answer

The sea breeze is a simple thermal circulation that does not involve a pressure gradient.

Correct AnswerverifiedShow Answer

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In both cases, pressure gradient force d...
View Answer

Correct Answer
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Correct Answer
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_are elongated high pressure areas extending towards the poles and are associated with_ .

Correct Answer
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Friction reduces the...
View Answer

Correct Answer
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