Ch 8

Front 1

The surface pressures at the bases of warm and cold columns of air are equal. Which of the followingstatements is not correct?

Back 1

Pressure will decrease with increasing height at the same rate in both columns.

Front 2

Suppose a parcel of air has a given temperature, pressure, and density. If the parcel's size remains the samewhile its temperature increases, then the air pressure inside the parcel will

Back 2

increase.

Front 3

Suppose a very cold parcel of air at 5.5 km (18,000 feet) is compared to a similar (but warm) parcel of air atsea level. Which of the following would be true?

Back 3

The parcel at sea level has higher pressure and higher density.

Front 4

The scale on an altimeter indicates altitude, but an altimeter actually measures

Back 4

pressure.

Front 5

Which of the following instruments measures pressure?

Back 5

barometer

Front 6

A station at an altitude of 900 m (about 3,000 feet) above sea level measures an air pressure of 930 mb. Undernormal conditions, which of the values below do you think would be the most realistic sea level pressure for thisstation?

Back 6

1,020 mb

Front 7

Lines connecting points of equal pressure are called

Back 7

isobars.

Front 8

On an isobaric surface,

Back 8

pressure is constant.

Front 9

Low ____ on a constant height chart corresponds to low ____ on a constant pressure chart.

Back 9

pressures, heights

Front 10

The contour lines drawn on a 500 mb chart are lines of constant

Back 10

altitude.

Front 11

On an upper-level chart the wind tends to blow

Back 11

parallel to the isobars or contours

Front 12

A ridge on an upper-level isobaric chart indicates

Back 12

higher-than-average heights

Front 13

During a reversible adiabatic process, the pressure gradient force is parallel to the isobars.

Back 13

false

Front 14

The Coriolis force is the force that causes the wind to blow.

Back 14

false

Front 15

Which of the following forces does not have a direct effect on horizontal wind motions?

Back 15

gravitational force

Front 16

Which of the following can influence wind direction?

Back 16

a. Coriolis forceb. pressure gradient forcec. centripetal forced. all of the above

Front 17

Which of the following forces cannot act to change the speed of the wind?

Back 17

Coriolis force

Front 18

The amount of pressure change that occurs over a given horizontal distance is called the

Back 18

pressure gradient.

Front 19

The pressure gradient force is directed from higher pressure toward lower pressure

Back 19

a. only at the equator.b. at all places on earth except for the equator.c. only in the Northern Hemisphere.d. only in the Southern Hemisphere.e. at all places on earth.

Front 20

The force that would cause a stationary parcel of air to begin to move horizontally is called the

Back 20

pressure gradient force.

Front 21

Which of the following produces the strongest Coriolis force?

Back 21

fast winds, high latitude

Front 22

The Coriolis force is the result of

Back 22

rotating earth.

Front 23

Which statement below is not correct concerning the Coriolis force?

Back 23

It is strongest at the equator

Front 24

If the earth stopped rotating, which of the following would not be true?

Back 24

There would still be a Coriolis force.

Front 25

Suppose that the winds aloft are geostrophic and blowing from the north. Low pressure is located to the

Back 25

east.

Front 26

A surface low pressure area that moves from south to north directly east of your home would most likelyproduce winds that shift from

Back 26

NE to N to NW.

Front 27

Surface winds blow across the isobars at an angle due to

Back 27

the frictional force.

Front 28

If, at your home in the Northern Hemisphere, the surface wind is blowing from the northwest, then the region oflowest pressure will be to the ____ of your home.

Back 28

east

Front 29

The wind around a surface high pressure center in the Northern Hemisphere blows

Back 29

clockwise and outward from the center.

Front 30

We can generally expect the air to be ____ above areas of surface low pressure and ____ above areas ofsurface high pressure.

Back 30

rising, sinking