During which of the following processes is oceanic crust recycled?
A. convection
B. mid-ocean rifting
C. subduction
D. ocean tides
E. sea floor spreading
Answer: C
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Ozone thinning is
A) greatest in the Northern Hemisphere in October. B) greatest in the Southern Hemisphere in April. C) evenly distributed for most of the year. D) more pronounced in Antarctica than the Arctic.
Thomas Malthus concluded that
A) population increased arithmetically while food production increased linguistically. B) the world's rate of population increase was higher than the development of food supplies. C) so-called "moral restraint" was producing lower crude birth rates. D) population growth was outpacing available resources in every country, according to algebraic calculations. E) crude birth rates must balance crude death rates.
A perusal of a world climate map shows that similar climates are located:
A) at similar latitudes. B) on similar continents. C) at similar elevations. D) at similar longitudes.
What is the maximum capacity of typical portable water tanks?
a. 3500 gal. b. 5000 gal. c. 2000 gal. d. 1500 gal.