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1. On a weather map, a line sweeping down from a low, marked with blue triangles on one side:
is the jet stream.
is a cold front.
is a warm front. 2. Which stage of a thunderstorm is characterized by prevailing updrafts?
Microburst
Cumulus
Mature 3. The tropopause is:
lower on the polar side of the jet stream core.
the top of all weather.
always found at the same altitude at any give latitude. 4. Low pressure systems in the Northern Hemisphere:
turn counterclockwise.
turn clockwise.
move east to west across the USA. 5. How thick is the tropopause?
1000'
It is an arbitary line separating the troposphere from the stratosphere.
It varies with the jet stream. 6. Air descends and flows outward in a high pressure system.
True
False 7. Virga is rain that evaporates before reaching the ground. It's a sign of:
turbulence and severe downdrafts.
stratus clouds at 12000' to 16000' in the area.
possible tornadoes. 8. Squall line thunderstorms are created by:
pressure waves up to 180 miles ahead of a cold front.
warm fronts.
hurricanes. 9. Thunderstorms have 3 stages. They are:
cumulus, mature, and dissipating.
stage one, two, and three.
air mass, orographic, and frontal. 10. Air masses and source regions affecting the United States are:
Maritime Polar, Continental Polar, Maritime Tropical, and Continental Tropical.
cold, hot, moist, and dry fronts.
the Pineapple Express, katabatic, and Gulf of Alaska. 11. As isobar is:
an International Standard Office Barometer.
A device for the crew on long haul flights for performing isometric exercises.
A solid line depicting sea level pressure on a map spaced 4 mb apart. 12. A trough contains converging air:
that's higher in pressure and flowing inward and down.
and is just the opposite of a ridge.
that's higher in pressure and flows outward and up. 13. Cold fronts can be divided into 2 general types.
Fast-moving and slow-moving.
Type A and Type B.
High pressure and low pressure. 14. Mountain waves can consist of:
cumulus, rotor, and lentil clouds.
stratus and rotor clouds.
rotor clouds, cap clouds, and lenticular clouds. 15. The tropopause varies from about 20,000' at the poles to as much as 65,000 at the equator.
True
False 16. To be classified as a jet stream, the wind must be at least:
50 kt.
110 kt.
150 kt. 17. CAT is found frequently in an upper trough:
on the warm (tropical) side of a jet stream.
on the cold (polar) side of a jet stream.
below 15,000'. 18. Steam fog (sea smoke) forms:
in summer above the Arctic Circle when cold, dry air moves from land over warmer water.
in winter when cold, dry air passes from land to warmer ocean water.
warm, moist ocean air moves inland. 19. The Tropics lie between latitudes 23 1/2 degrees North and 23 1/2 degrees South.
True
False 20. In the ITCZ, converging winds force air upward carrying huge amounts of water to great heights.
True
False
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Updated: 12/26/2005.
