The currents of the major oceanic gyre systems are driven by:
A) volcanic activity on the ocean floor.
B) jet streams and Rossby Waves in the upper atmosphere.
C) tropical Storm activity.
D) drag of surface winds that are part of the major anticyclonic pressure and wind systems over the ocean basins.
Answer: D
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The United States is withdrawing groundwater from aquifers at a rate that is, on average, ____.
A. equal to the rate that they are recharged B. four hundred times faster than they can be recharged C. four times faster than they can be recharged D. two times slower than the rate of recharge E. twenty times slower than the rate of recharge
A sodium hydroxide solution has a pH of 11.40, what is the [H3O+] in this solution?
A) 4.0 x 10^-26 M B) 4.0 x 10^-12 M C) 2.5 x 10^-3 M D) 2.5 x 10^11 M
Wood and charcoal burning is still the main energy source for about 30 percent of the world's population.
Answer the following statement true (T) or false (F)
How many valence electrons does bromine (Br, atomic no. = 35 ) have?
A) 1 B) 7 C) 21 D) 28 E) 35