What does not affect surface currents?
a. Gravity
b. Coriolis Effect
c. Wind
d. Density
ANS: D
Wind allows water flow to start in surface currents. The water "piles up" in the direction the wind
blows. Gravity pulls the water down the slope the water creates when piled up. The Coriolis Effect
deflects the moving mass of water to the left or right depending on the hemisphere. Information can be
found in the section Surface Currents Are Driven by the Winds
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MgCl2 crystals are composed of
A. a multitude of Mg2+ ions and Cl- ions grouped together in a three-dimensional array with a 1:2 ratio of Mg2+ to Cl-. B. units composed of six Mg atoms and six Cl2 molecules. C. a two-dimensional array of [-Mg-Cl-Cl-] units. D. groups of Mg2+ ions and Cl2 molecules. E. units of MgCl2 molecules held together by dipole interactions.
When a commodity is in short supply, the cost ________
A) remains the same B) is near the cost of production C) decreases D) goes up
Somalia is noted for this type of rule, in which patrilineal descent groups define the political and legal status of people and assign them specific social claims and obligations
A) Galmudug B) clanocracy C) ujamaa D) socialism
Which Greek philosopher thought that matter was infinitely divisible?
A) Aristotle B) Democritus C) Plato D) Zeno