The relatively small eruptions of the Icelandic volcano Eyjafjallajokull in 2010 caused major disruptions because the eruptions ____
A)were pyroclastic and debris was thrown as far as three kilometers
B)occurred in a densely populated area
C)caused tsunamis and disrupted sea trade
D)took place beneath a glacier resulting in steam explosions that disrupted air traffic for several days
E)caused shallow earthquakes that caused landslides and destroyed buildings
D
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All are part of Australia except:
A. Great Barrier Reef B. The Great Dividing Range C. Southern Alps D. The Outback
Basic components of sand include shells and quartz. How did these particles get so small?
A) through artificial grinding B) heat and pressure C) animals walking on them so much D) physical weathering
The greatest future growth in human numbers is expected to occur in the
A. developing nations. B. rich countries of Europe and North America. C. rich Asian countries including Japan.
A factor that can influence earth's temperature but not be influenced by humans is
A. aerosol concentration. B. variations in solar radiance. C. atmospheric albedo. D. surface albedo.