Day 17

Calm, fair weather is most likely to result from a(n) ________. A) tropical cyclone B) midlatitude cyclone C) midlatitude anticyclone D) tornado E) chinook

A midlatitude anticyclone ________. A) is more than one air mass B) exhibits instability C) has a front in its center D) is associated with fast winds E) is associated with sunny, dry weather

An average air mass is on the order of ________ kilometers in diameter. A) 1 B) 10 C) 160 D) 1,600 E) 16,000

The warmest air can be found in the ________ air mass. A) cP B) mP C) mT D) cT E) E

Which of the following is NOT NECESSARILY a property of an air mass? A) It must be large. B) It must have relatively uniform properties within itself. C) It must have a warm front at its leading edge. D) It must travel as a recognizable entity. E) It must modify as it leaves its source region.

Which of the following rarely affects North America? A) continental tropical B) maritime tropical C) Arctic D) continental polar E) equatorial

Which of the following occurs least over North America? A) Maritime Tropical air from the North Pacific B) Maritime Polar air from the Gulf of Alaska C) Maritime Tropical air from the Pacific D) Maritime Polar air from the North Atlantic E) Arctic air from Siberia

Of the air masses below, the coldest, driest ones are termed ________. A) maritime Tropical B) continental Tropical C) continental Polar D) Equatorial E) maritime Polar

When neither air mass displaces the adjacent one, their boundary is called a(n) ________ front. A) warm B) cold C) stationary D) occluded E) dry

Fronts are located ________. A) near air masses B) underneath air masses C) in the middle of air masses D) at the edges of air masses E) with respect to motion, to the rear of air masses

________ have the most dynamic and changeable day-to-day weather on Earth. A) Tropical latitudes B) Latitudes affected by fronts C) Polar latitudes D) Latitudes affected by hurricanes E) Air mass source regions

It can be said that along all the fronts in a middle latitude cyclone, ________. A) cold air sinks B) air rises C) precipitation is unlikely D) the pressure is high E) heavy rain occurs

On the average, ________ fronts move the fastest of all fronts. A) warm B) cold C) stationary D) occluded E) hot

On a weather map, a symbol consisting of triangles arranged along one side of a line indicates a(n) ________ front. A) warm B) cold C) stationary D) occluded E) tropical

Which of the following probably is least indicative of a cold frontal passage two hours ago? A) an increase in temperature B) a change in wind speed C) an increase in in humidity D) an increase in stability E) a change in wind direction

Which type of front typically produces the fastest rise of air? A) cold B) warm C) stationary D) occluded E) dark

Which type of front causes many hours of steady rain BEFORE that front passes a location? A) warm B) cold C) stationary D) dry line E) tropical

The global westerly wind zone most heavily impacts the ________ latitudes. A) equatorial B) high C) middle D) subtropical E) horse

Midlatitude cyclones and anticyclones function as migratory features in the ________. A) westerlies B) easterlies C) ITC D) stratosphere E) ionosphere

Upper air divergence is most closely associated with surface ________. A) anticyclones B) inversions C) cyclones D) isobars E) air mass source regions