Which of the following is usually lower in urban areas compared to rural areas?
A. temperature
B. concentration of pollution
C. visibility
D. frequency of fog
Answer: C
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The first comprehensive theory of continental drift was propounded by _______.
a - Wallace b - Darwin c - Koppen d - Wegener e - Sagan
P waves ________.
a.) have higher amplitudes than do S waves b.) propagate only in solids c.) produce the strongest ground shaking d.) are faster than S waves and surface waves
Belgium's language boundary sharply divides the country into two regions. What are the two languages spoken in these two regions?
A) French and Walloons B) French and Flemish C) Italian and German D) Dutch and German E) Italian and Dutch
During Northern Hemisphere winter, _______________ pressure cells develop over the land areas
Fill in the blank(s) with correct word