Air Pressure and Wind Practice

Air Pressure and Wind Practice

Multiple Choice

1) The map below shows a typical position and average velocity of the polar front jet stream during two different seasons.

For the eastern United States, the change of the polar front jet stream from this summer position to this winter position causes

• (1) warmer temperatures farther north and causes storms to move more slowly

• (2) warmer temperatures farther north and causes storms to move more rapidly

• (3) cooler temperatures farther south and causes storms to move more slowly

• (4) cooler temperatures farther south and causes storms to move more rapidly

Multiple Choice

2) Most of the air in the lower troposphere at the equatorial low-pressure belt is

• (1) warm, moist, and rising

• (2) warm, dry, and rising

• (3) cool, moist, and sinking

• (4) cool, dry, and sinking

Multiple Choice

3) Which graph best represents the change in air pressure as air temperature increases at Earth’s surface?

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Multiple Choice

4) An instrument used to measure a weather variable is shown below. Which weather variable is measured by this instrument?

• (1) wind direction

• (2) air pressure

• (3) wind speed

• (4) amount of rainfall

Multiple Choice

5) A high air-pressure, dry-climate belt is located at which Earth latitude?

• (1) 0°

• (2) 15° N

• (3) 30° N

• (4) 60° N

Multiple Choice

6) Which map shows normal paths followed by low-pressure storm centers as they pass across the United States?

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Multiple Choice

7) The map below indicates an air-pressure field over North America. Isobar values are recorded in millibars.

At which city was the greatest wind speed occurring?

• (1) Boise

• (2) Denver

• (3) Kansas City

• (4) Austin

Multiple Choice

8) Which weather instrument is used to determine wind direction?

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Multiple Choice

9) Which cross section best represents how surface

winds form by midafternoon near a shoreline on a hot summer day? [Diagrams are not drawn to scale.]

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Multiple Choice

10) The diagram represents the circulation of air above Earth’s surface at a coastal location during the day and at night. This local air movement is best described as an example of

• (1) conduction between Earth’s surface and the atmosphere above it

• (2) condensation of water vapor during the day, and evaporation of water during the night

• (3) convection resulting from temperature and pressure differences above land and water

• (4) greater radiation from the warmer ocean during the day and from the warmer land at night

Multiple Choice

11) Jet stream winds over the United States generally move from

• (1) east to west

• (2) west to east

• (3) north to south

• (4) south to north

Multiple Choice

12) Air pressure is usually highest when the air is

• (1) cool and humid

• (2) cool and dry

• (3) warm and humid

• (4) warm and dry

Multiple Choice

(13) The cross section below shows a sea breeze blowing from the ocean toward the land.

The air pressure at the land surface is 1013 millibars. The air pressure at the ocean surface a few miles from the shore

is most likely

• (1) 994 mb

• (2) 1005 mb

• (3) 1013 mb

• (4) 1017 mb

Multiple Choice

14) Which weather condition most directly determines wind speeds at Earth's surface?

• (1) visibility changes

• (2) amount of cloud cover

• (3) air-pressure gradient

• (4) dewpoint differences

Multiple Choice

15) In which temperature zone of Earth's atmosphere is the polar jet stream located?

• (1) lower thermosphere

• (2) lower mesosphere

• (3) upper stratosphere

• (4) upper troposphere