Which are the most persistent surface winds?
a. Doldrums
b. Westerlies
c. Easterlies
d. Trades
ANS: C
Easterlies, also known as trade winds, are the most constant surface winds found between the zones of
descending and ascending air masses. Information can be found in the section Atmospheric Circulation
Generates Large-Scale Surface Wind Patterns.
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Chemical equations need to be balanced not only in terms of the number of atoms, but also by the charge. In other words, just as there should be the same number of atoms before and after the arrow of an equation, there should be the same charge. What set of coefficients is necessary to balance the following chemical equation? ________ Ce4+ + ________ Cl? ? ________ Ce3+ + ________ Cl2
A. 1, 4, 1, 2 B. 2, 2, 2, 1 C. 1, 2, 1, 1 D. 3, 4, 3, 2
Which of the following is not a factor that is contributing to the decline in amphibian populations?
a. habitat loss and fragmentation b. viral and fungal diseases and parasites c. increase in UV radiation d. prolonged drought e. hunting of frogs for froglegs, a delicacy that is served in restaurants
Lead-214 (Pb-214) that undergoes beta decay becomes ____
a. Pb-212 b. Bi-210 c. Bi-214 d. Tl-214 e. Tl-210
Most rock samples tested by the unconfined compression test fail:
a. along horizontal planes perpendicular to the maximum principal stress b. along planes inclined at an angle to the maximum principal stress c. along vertical planes parallel to the direction of maximum principal stress d. along vertical planes perpendicular to the direction of maximum principal stress