Choose the best answer.
Which of the following statements is false?
|A)||Cyclones move cold air toward the equator and warm air poleward.|
|B)||The temperature contrast on either side of the polar front serves as a source of potential energy for developing cyclones.|
|C)||Cyclones convert kinetic energy into potential energy as the storm's winds strengthen.|
|D)||Cyclones derive energy from latent heat released by condensing water vapor.|
A front is:
|A)||characterized by sharp temperature changes.|
|B)||a dividing line between two air masses of different characteristics.|
|C)||a region of drastically changing weather conditions.|
|D)||all of the above.|
|E)||none of the above.|
A good source region for a continental air mass would be:
|A)||the southern Indian Ocean.|
|B)||the Hawaiian Islands.|
|C)||the Canadian Prairie.|
If a short wave trough is forecast to pass over your location, what kind of weather might you expect?
|A)||A relatively short bout of stormy weather, followed by clearing skies.|
|B)||A prolonged period of unsettled weather.|
|C)||Plenty of sunshine, followed by clouds and precipitation.|
|D)||Several days of sunny weather and warm temperatures.|
Which of the following processes/phenomena lead(s) to strengthening cyclones?
|B)||Westward 'tilt' of the system with height (upper trough behind surface low).|
|C)||Warm and cold advection associated with the cyclone's cold and warm fronts.|
|D)||All of the above are true.|
|E)||None of the above is true.|
The earth's desert regions serve as source regions for _____ air masses.
|A)||continental tropical (cT)|
|B)||continental polar (cP)|
|C)||maritime polar (mP)|
|D)||maritime tropical (mT)|
|E)||continental Arctic (cA)|
|A)||form as fast-moving cold fronts overtake slower warm fronts.|
|B)||are usually found at the end of a cyclone's life cycle.|
|C)||are characterized by cool/cold air on both sides of the boundary.|
|D)||All of these statements apply.|
|E)||None of these statements applies.|
The late afternoon is characterized by sunshine and warm temperatures, while thunderstorms occur in the evening, followed by clear skies and a sharp drop in temperatures that night. What type of boundary has most likely passed through?
What features allow us to determine the position of a front on a weather map?
|A)||Sharp changes in wind direction.|
|C)||Drastic changes in dew-point temperature.|
|D)||A and B are useful.|
|E)||All of these features are useful.|
How do the Rocky Mountains lead to the development of stationary fronts?
|A)||Shallow cold air masses from central Canada cannot move over the mountains.|
|B)||Overrunning and topography combine to form clouds and precipitation.|
|C)||Air gliding down the lee side of the mountains becomes warmer and advances into the Plains region of the U.S.|
|D)||Cold air masses travel unimpeded over the Rockies, meaning that stationary fronts do not form near mountains.|
|A)||typically occurs with cold fronts.|
|B)||produces a narrow band of clouds and precipitation right along or just ahead of a front.|
|C)||often results in cumulonimbus clouds and thunderstorms.|
|D)||occurs as warm (less dense) air glides up and over colder (more dense) air near the ground.|
When cP air moves southward from Canada into the U.S. during the summer, it passes over warmer land. As a result, the thermal contrast across the cold front decreases. This is an example of:
How does upper-level divergence lead to the intensification of cyclones at the surface?
|A)||If upper-level divergence exceeds low-level convergence, the cyclone's pressure falls.|
|B)||Upper-level jet streaks produce areas of upper-level divergence and convergence.|
|C)||If low-level convergence exceeds upper-level divergence, the cyclone's pressure falls.|
|D)||Upper-level divergence is associated with increasing cyclonic vorticity, which in turn makes cyclones spin faster.|
Which of the following is not a part of the conveyor belt model of frontal cyclones?
|A)||Warm conveyor belt.|
|B)||Moist conveyor belt.|
|C)||Cold conveyor belt.|
|D)||Dry conveyor belt.|
|E)||All of these are part of the conveyor belt model.|
Continental polar air masses are typically associated with what kind of winter weather?
|A)||Clear skies and warm temperatures.|
|B)||Sunny but cold.|
|C)||Cool, rainy conditions.|
|D)||Hazy, hot and humid, with scattered afternoon thunderstorms.|