11) Which of the following describes Pressure Gradient Force? it causes deflecti

Question

11) Which of the following describes Pressure Gradient Force? it causes deflection of winds from a straight path it decreases with height above the surface it drives air flow from areas of low pressure to areas of high pressure it drives air from areas of high pressure to areas of low pressure a. · · d. the elevation at which: a. b. C. d. Dew point occurs Relative humidity reaches 100% Relative humidity reaches 0% Both A and B 13) Which of the following is NOT correctly matched? a. High altitude clouds- stratus b. Thunderstorm clouds-cumulonimbus C. Thin, wispy clouds- cimus d. Puffy clouds-cumulus 14) Where on Lake Erie is a lake-effect snowtall LEAST likely to ocour? a. The far eastern shore (Buffalo) b. The southeastern shore (Cleveland) c. The far western shore (Toledo) d. Lake effect snow doesnt occur on the shores of Lake Erie 15) A mT air mass is likely to be than a cP air mass because the mT air mass a. b. c. d. Wetter: forms over the ocean Drier : forms over the ocean Wetter: forms over land Drier; is a cold air mass

Explanation / Answer

11. d) it drives air from areas of high pressure to areas of low pressure.

Explanation : Pressure Gradient Force indicates at what rate and in which direction the air blows and how the pressure increases around a certain region. It originates only when there is a pressure difference across a surface and it is always directed from a high pressure region towards a low pressure region.

12) d) both A and B.

Explanation : The bottom of clouds form at elevations where the dew point occurs and the relative humidity reaches 100%.

13) a) High altitude clouds - stratus.

Explanation : Stratus is a low altitude cloud whereas cirrocumulus, cirrostratus and cirrus are high altitude clouds.

14) b) The far western shore ( Toledo )

Explanation : Lake effect snowfall occurs when cold air after passing over long distances of relatively warm waters picks up enough moisture which when heated up is forced to come down as snow. The belts of Buffalo and Cleveland are major snowbelts.

15) a) Wetter; forms over the ocean.

Explanation : mT or maritime Tropical air masses occur in the tropical regions over the oceans thus carring much moisture making it wetter than the cP or Continental Polar air masses that occur in the cold Polar regions that are relatively much drier.

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