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Exam 18: Air Pressure and Wind

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Question 31

True/False

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Low pressure systems are usually associated with clear weather.

A) True
B) False

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Question 32

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The Sahara and Australian deserts (among others) are associated with the ________.

A) subtropical high
B) equatorial low
C) subpolar low
D) polar high

E) C) and D)
F) B) and D)

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Question 33

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

When are upper air winds fastest?

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?

When Hurricane Katrina was a category 5 hurricane at its peak strength,the air pressure in the eye of the storm was 902mb.Near the earth's surface,the air pressure falls off at roughly 100mb per kilometer.So if you had an uncorrected altimeter in the eye of Katrina at sea level (not a good place to be) ,what altitude would it have read?

Standard sea level air pressure is 29.92 inches of mercury.

The Coriolis effect influences wind speed but not wind direction.

In the Northern Hemisphere,winds blow clockwise and outward from the center of anticyclones.

A steep pressure gradient ________.

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

An altimeter is an adaptation of the ________.

Considering the theory of plate tectonics and the movement of landmasses over geologic time,would you expect atmospheric circulation of the past to be the same as we see today? Why or why not? Consider the factors that determine global wind patterns and whether they have changed over time.

Torricelli invented the mercurial barometer.

A north wind blows from the ________ to the ________.

An instrument that measures air pressure using a partially evacuated chamber is called a(n)________ barometer.

trade winds westerlies Chinook polar easterlies

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

"Perhaps more than any other single measurement,atmospheric pressure is the best indicator of current and changing weather conditions." Briefly discuss why this statement is correct.

Cyclones are usually associated with stormy weather.