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
Question 2
According to latitude and place in the surface westerlies, which of the following is the least likely zone of formation for a large air mass?
A) Eastern Siberia
B) Northern Sahara
C) Under an oceanic subtropical high
D) Caribbean Sea
E) The U.S. Midwest
Convergence among tropical alpine plants: (a) Senecio trees on Mount Kilimanjaro, Africa
Map of Mars from Hubble Space Telescope as seen near the 1999 opposition. (North top)
The complexity of a tropical forest may have favored the evolution of primate intelligence.
Black and White Out-Migration from Virginia and North and South Carolina, 1870–1940 (in thousands)
Tropical Wet and Dry (Aw)