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- 1. Multiple Choice
Which of these instruments is not used to measure air pressure?
anemometer
aneroid barometer
barograph
mercurial barometer
- 2. Multiple Choice
An altimeter is an adaptation of the ________.
barograph
aneroid barometer
anemometer
mercurial barometer
- 3. Multiple Choice
The force that generates wind is _______.
centrifugal force
gravity force
pressure gradient force
Coriolis force
- 4. Multiple Choice
Isobars are lines on a weather map representing what?
lines of equal air pressure
lines of equivalent air speed
lines showing equal density of bars
lines of equal elevation for the tropopause
- 5. Multiple Choice
Closely spaced isobars indicate ________.
high pressure gradient and high winds
geostrophic conditions
high pressure gradient and likely gusty winds
low pressure gradient and weak gusty winds
- 6. Multiple Choice
A steep pressure gradient ________
produces light winds
is only possible in the tropics
would be depicted by widely spaced isobars
produces strong winds
- 7. Multiple Choice
Widely spaced isobars often indicate ________.
variable winds
light winds
cyclonic winds
high winds
- 8. Multiple Choice
The Coriolis effect influences ________.
only wind direction
only wind speed
both wind speed and wind direction
neither wind speed nor wind direction
- 9. Multiple Choice
Upper air winds ________.
are unaffected by the Coriolis force
are greatly influenced by friction
are generally faster than surface winds
- 10. Multiple Choice
Low air pressure systems are usually associated with ________.
clear weather
diverging surface winds and low pressure aloft
descending air and low pressure aloft
converging air, precipitation, and high pressure aloft
- 11. Multiple Choice
If "fair" weather were approaching, the pressure tendency would probably be ________.
falling
steady
rising
none of these
- 12. Multiple Choice
If stormy weather were approaching, the pressure tendency would probably be ________.
falling
rising
steady
none of these
- 13. Multiple Choice
Tropical cyclones produce the most intense low-pressure systems on earth. To develop and maintain this low pressure, what must happen aloft in this type of storm?
the storm must push the tropopause far into the stratosphere to maintain the low pressure.
a strong divergent flow (outflow) aloft must keep up with, or exceed, the inflow near the surface.
a strong jet stream flow must be present to maintain the inward flow.
rain must fall to force thunderstorms to collapse to keep the air circulation going,
- 14. Multiple Choice
Tropical cyclones (aka hurricanes in the Atlantic) are intense low-pressure systems characterized by heavy rain and high winds. When a tropical cyclone passes an area, however, there are generally several days of clear, dry weather. Why might this occur?
the cyclone must have an outflow aloft, which feeds descending air surrounding the storm.
The spiral arms of the hurricane are storm fronts, and each carries descending air behind it.
The cyclone has sucked up all the moist air around it, leaving dry air behind.
The hurricane carries a cold front with it, which carries dry air.
- 15. Multiple Choice
In the Northern Hemisphere, the winds associated with a low pressure system (cyclone) blow ________.
counterclockwise and toward the center
counterclockwise and outward from the center
clockwise and outward from the center
clockwise and toward the center
- 16. Multiple Choice
In the Northern Hemisphere, winds associated with a high pressure system blow ________.
clockwise and toward the center
counterclockwise and outward from the center
counterclockwise and toward the center
clockwise and outward from the center
- 17. Multiple Choice
High air pressure systems are usually associated with ________.
descending air
clear weather
diverging winds
all of these
- 18. Multiple Choice
Consider the below image: What would you expect to happen in terms of air flows (wind)?
They will flow towards the L horizontally.
They will spin downward and dissipate.
They will flow away from the L horizontally.
They will flow vertically upward from the L.
- 19. Multiple Choice
Another name for the area low pressure in the equatorial region is the ________.
westerlies
subpolar easterlies
doldrums
horse latitudes
- 20. Multiple Choice
The Sahara and Australian deserts (among others) are associated with the ________.
equatorial low
subtropical high
polar high
subpolar low
- 21. Multiple Choice
This pressure zone is associated with abundant precipitation and warm temperatures.
subpolar low
polar high
subtropical high
equatorial low
- 22. Multiple Choice
Why do storm systems move from west to east in mid latitudes of the Northern Hemisphere?
The continents break up air flow that would normally be south to north and the Coriolis force turns the storms to the right, or toward the east.
The prevailing wind is from the east, and the storm systems move toward the surface flow.
The storms are steered by approximately west to east winds aloft that are approximately geostrophic winds produced by Coriolis forces.
The prevailing wind is from the west.
- 23. Multiple Choice
Asia has an intense monsoon, but North America also experiences a low-intensity monsoon. What causes monsoons?
The heating of the continent during the summer produces a persistent low pressure over the continent that draws warm moist air masses from adjacent oceans.
The horse latitude high pressure system breaks down in summer, leading to monsoon moisture in desert locations like southwestern North America and India.
Heating of the polar regions in summer due to long days causes air to flow toward the poles in summer, drawing moisture from warm ocean dominated air masses.
The oceans warm faster than the continents during the summer and spawn cyclonic storms that move toward the continents.
- 24. Multiple Choice
Most of the United States is situated in which zone of prevailing winds?
subpolar easterlies
trade winds
doldrums
westerlies
- 25. Multiple Choice
Fast moving currents of air found near the top of the troposphere are called ________.
jet streams
El Nino
mesocyclones
chinooks
- 26. Multiple Choice
A land breeze usually originates during the ________.
day and flows toward the water
day and flows toward the land
evening and flows toward the water
evening and flows toward the land
- 27. Multiple Choice
What is the Southern Oscillation?
the intermittent switch from El Niño to La Niña conditions in the equatorial Pacific
the periodic intense cyclonic storms from Antarctica
the weather pattern that changes tropical cyclone activity in the southern ocean
the 10-year cycle in winter storm activity in the temperate zone of the Southern Hemisphere
- 28. Multiple Choice
An isobar is a line connecting places of equal ________.
humidity
pressure
gradient
temperature
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