What is the source of most of the dissolved materials found in the ocean?
A) Outgassing
B) Convection currents
C) Dissolving and weathering of crustal rocks
D) Biological activities
C
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Temperatures in cities are higher as a result of
A) pavement and buildings storing heat during the day and releasing it at night. B) increased evapotranspiration in the city. C) greater insolation. D) increased number of trees.
Which statement about higher gasoline taxes is true?
A. They failed to result in increased use of mass transit and car sharing in Europe. B. They have successfully reduced single occupancy vehicle use in the United States. C. They are generally supported by the transportation and fuel industries. D. They are more acceptable when fast, efficient, reliable, and affordable mass-transit options, bike lanes, and sidewalks are available. E. They are generally more accepted by dispersed populations than more concentrated populations.
Filtration and distillation are ____ methods for detoxifying hazardous waste.
A. physical B. chemical C. biological D. natural E. inexpensive
What characteristics make the Maldives so suitable for the mainstays of its economy?
A. majestic, cloud-shrouded volcanic mountains B. considered by many to have the most beautiful people on Earth C. hot springs and geothermal baths D. it is a group of low elevation atolls in the Indian Ocean