8

Question 1

T/F: we can generally expect the air to be rising above areas of surface low pressure and sinking above areas of surface high pressure.

Answer 1

‘True

Question 2

Surface winds move ________ From the center of a high pressure area

Answer 2

Outward (diverges)

Question 3

T/F: Air pressure decreases with height more rapidly in warm air than cold air

Answer 3

False

Question 4

Which force acts at a 90 degree angle to the wind?

Answer 4

Coriolis force

Question 5

What is generally associated with troughs on an upper level iso basic chart?

Answer 5

Low pressure center

Question 6

Another term for isobaric charts is?

Answer 6

Constant pressure chart

Question 7

A station at an altitude of 900mb (about 3,000 ft) above sea level measure, with an air pressure of 930 mb would have a sea level pressure of?

Answer 7

1020 mb

Question 8

If upper-level divergence exceeds surface convergence, the air pressure at the center of the surface low will _____?

Answer 8

Decrease

Question 9

On an isobaric surface, pressure is ____?

Answer 9

Constant

Question 10

What pressure variation cause air to move from areas of high pressure to areas of low pressure

Answer 10

Horizontal pressure variations

Question 11

What is the angle at which surface winds cross isobars?

Answer 11

A large degree dependent on the roughness of the terrain

Question 12

The magnitude of the coriolis force varies with wind speed and?

Answer 12

And latitude

Question 13

T/F: the Coriolis force is the force that causes wind to blow

Answer 13

FALSE

Question 14

T/F: The pressure gradient force is non-existent at the equator

Answer 14

False

Question 15

The change in _____ that occurs over a given horizontal distance is called the pressure gradient

Answer 15

amount of pressure change

Question 16

The pressure gradient force is directed from higher pressure towards lower pressure at?

Answer 16

All places on earth

Question 17

A geostrophic wind is a wind that results from a balance between what two forces?

Answer 17

The Coriolis force and the pressure gradient force

Question 18

What is considered to be standard sea-level atmospheric pressure (in mb)

Answer 18

1013.25 mb

Question 19

What is the theoretical wind that would result from an exact balance between the Coriolis force and the pressure gradient force ?

Answer 19

Geostrophic flow

Question 20

Surface winds that blow across isobars at an angle and the pressure gradient force is balanced by the ______ force and the Coriolis force.

Answer 20

Frictional force

Question 21

What does a ridge indicate on an isobaric chart?

Answer 21

indicates higher than average heights

Question 22

T/F: an altimeter measures altitude but is calibrated to indicate pressure?

Answer 22

FALSE

Question 23

Which of the following produces the strongest Coriolis force?

Answer 23

Fast winds and High latitude

Question 24

The pressure gradient force has a direct effect on ?

Answer 24

Horizontal wind movements

Question 25

The surface pressure at the bases of warm and cold columns of air are equal. Air pressure in the warm column of air will _______ with increasing height _____________ in the cold column

Answer 25

Decrease, More slowly than,

Question 26

T/F: Net convergence of air would cause surface pressure to increase and net divergence would cause surface pressure to decrease.

Answer 26

True

Question 27

Isobaric surfaces are higher or lower in less dense, warm air? Higher or lower in cold more dense air?

Answer 27

Higher, lower

Question 28

What causes surface winds to move more slowly than winds aloft with the same pressure gradient.

Answer 28

Friction

Question 29

The Coriolis force is a ________ force created by earths rotation

Answer 29

Apparent force

Question 30

Upper level winds in the middle latitudes of both hemispheres generally blow from the?

Answer 30

West

Question 31

T/F: because lows are also known as cyclones, the flow of air around them is often called anticyclonic flow

Answer 31

FALSE

Question 32

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

Answer 32

The pressure gradient force

Question 33

On a 500 mb chart, contour lines are drawn to represent horizontal changes in ________, which corresponds to horizontal changes in ________.

Answer 33

Altitude, pressure

Question 34

Warm air aloft is associated with constant pressure surfaces that are found at higher latitudes than normal and higher than normal atmospheric ______ aloft

Answer 34

Pressure

Question 35

Millibars and hectopascal are commonly found on a surface weather map and are both units of what?

Answer 35

Pressure

Question 36

A rapid change in pressure over a relatively short distance is called?

Answer 36

A steep pressure gradient

Question 37

The wind around a surface high pressure center in the northern hemisphere blows ______ and outward from the center

Answer 37

Clockwise

Question 38

In the middle latitudes, when an area of higher pressure approaches a city, surface pressure usually ____ when it moves away. Pressure usually _______.

Answer 38

Rises,Rises