WX201 Chpt11, WX HW#15, WX HW#14-Questions and Correct Verified Answers
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Course
WX 201
Institution
WX 201
The unit of pressure most commonly found on a surface weather map is
millibars or hectopascals.
The wind around a surface high pressure center in the Northern Hemisphere blows
clockwise and outward from the center
Which of the following instruments measures pressure?
barometer
If upper-lev...
WX201 Chpt11, WX HW#15, WX
HW#14-Questions and Correct Verified
Answers
The unit of pressure most commonly found on a surface weather map is
✓ millibars or hectopascals.
The wind around a surface high pressure center in the Northern Hemisphere blows
✓ clockwise and outward from the center
Which of the following instruments measures pressure?
✓ barometer
If upper-level divergence exceeds surface convergence, the air pressure at the center of the
surface low will
✓ decrease.
The force that would cause a stationary parcel of air to begin to move horizontally is called
the
✓ pressure gradient force.
Upper-level winds in the middle latitudes of both hemispheres generally blow from ____.
✓ the west
A geostrophic wind is a wind that results from a balance between the ____ force and the
____ force.
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11
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✓ Coriolis; pressure gradient
Horizontal pressure variations cause air to move from areas of _____ pressure to areas of
____ pressure.
✓ high; low
The amount of pressure change that occurs over a given horizontal distance is called the
✓ Coriolis parameter.
Because of friction, surface winds move ____ winds aloft with the same pressure gradient.
✓ more slowly than
Surface winds blow across isobars at an angle and the pressure gradient force is balanced
by the ____ force and the Coriolis force.
✓ frictional
Pressure changes
✓ more rapidly in the vertical direction than in the horizontal.
Which pressure unit is most commonly used in aviation?
✓ inches of mercury
On an isobaric surface,
✓ pressure is constant.
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A station at an altitude of 900 m (about 3,000 feet) above sea level measures an air pressure
of 930 mb. Under normal conditions, which of the values below do you think would be the
most realistic sea level pressure for this station?
✓ 1,020 mb
Atmospheric shortwaves usually move ____ longwaves, and ____ when they move through
a longwave ridge.
slower than; weaken
faster than; strengthen
faster than; weaken
at the same speed as; weaken
slower than; strengthen
✓ faster than; weaken
According to the model of the life cycle of a wave cyclone, the storm system is normally
most intense
as a frontal wave.
as a stationary wave.
when the system first becomes occluded.
as a stable wave.
as an open wave.
✓ when the system first becomes occluded.
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