Many of the volcanoes in mainland Alaska and the Aleutian Islands ____
A)are in the Cascade Range
B)were formed over hot spots
C)were formed over divergent plate boundaries
D)have formed within the last 1000 years
E)are composite volcanoes
E
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What is the relationship between plucking and abrasion on a glacially scoured landscape?
A) Plucking occurs relatively suddenly when a glacier first encounters the landscape, and then if it remains in place for a long time, abrasion begins to happen later over a long period of time. B) Abrasion occurs relatively suddenly when a glacier first encounters the landscape, and then if it remains in place for a long time, plucking begins to happen later over a long period of time. C) Plucking occurs on the upflow side of a mound or hill that is scoured, while abrasion occurs on the downflow side. D) Abrasion occurs on the upflow side of a mound or hill that is scoured, while plucking occurs on the downflow side.
Los Angeles type smog is primarily a result of
A) smoke. B) fog. C) photochemical reactions. D) advected coastal fog laden with salt crystals.
Counterurbanization has occurred primarily in
A) the West Coast states. B) the Southern states. C) the Northeastern states. D) the Midwestern states. E) the Rocky Mountain states.
The infectious disease that poses the greatest risk of death for people living in northern Eurasia and Africa is
A) tetanus. B) measles. C) tuberculosis. D) hepatitis.