Which air masses influence the humid continental hot-summer climates in North America?
A) continental Arctic (cA) year-round
B) continental polar (cP) year-round
C) continental polar (cP) and continental tropical (cT), especially in summer
D) continental polar (cP) and maritime tropical (mT), especially in winter
E) continental polar in summer (cP) and continental Arctic (cA) in winter
D
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The occurrence of earthquakes in the absence of seafloor spreading, oceanic trenches, or volcanic activity is a characteristic feature of
A. convergent boundaries between plates. B. transform fault boundaries between plates. C. subduction zones. D. divergent boundaries between plates.
On the accompanying map, volcanic eruptions are most likely at locations
A) 1 and 2.
B) 2 and 3.
C) 3 and 4.
D) 1 and 3.
E) 2 and 5.
The country in Central America that gained its independence in 1981 from the British is
A. Costa Rica B. El Salvador C. Belize D. Panama
Lead pollution is a problem because lead ________
A) will cause the ozone hole to increase B) causes central nervous system damage in humans C) can become attached to radon D) causes excess nutrification of waterways, resulting in eutrophication E) is a precious metal, and it is being lost to the atmosphere