The upper part of a thunderstorm cloud is normally __________ charged, and the middle and
lower parts are __________ charged.
a. negatively, negatively
b. negatively, positively
c. positively, positively
d. positively, negatively
d
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A great tool for visualizing and comparing a population's age and sex composition is:
A. population pyramids. B. demographic transition model. C. doubling time. D. the demographic equation.
The grinding and shaping of rock surfaces by the "sandblasting" action of particles carried by wind is
A) abrasion. B) deposition. C) saltation. D) deflation.
_____ contains the most proven reserves of oil in the world, while _____ consumes the most
a. Mexico; Japan b. Kuwait; France c. Venezuela; the United States d. The United States; the United States
O2 can be produced by the reaction 2 KClO3(s) ? 2 KCl(s) + 3 O2(g). In one experiment 0.312 g of O2 were formed. How much KClO3 was decomposed?
A) 0.484 g B) 0.797 g C) 1.19 g D) 1.79 g