What is the one factor that dictates the presence of prairie and the relative absence of trees?
Answer: Critical degree of evaporation
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Approximately how long ago did the Chesapeake Bay impact occur?
a. 5 million years b. 15 million years c. 35 million years d. 45 million years e. 70 million years
Cyclone
?
The following questions refer to the above illustration of a middle-latitude cyclone. The dashed lines show the positions of the fronts six hours ago.
At which location represented by the four positions on the map would you expect to hear the following 12-hour forecast: "Cloudy and cold this morning with snow this afternoon and tonight"?
A. position 1 B. position 2 C. position 3 D. position 4
Which of the following was largely destroyed by fire in 1871?
A. San Francisco B. Chicago C. Lisbon D. Tokyo E. Moscow
What country is Canada's single largest trading partner?
A) United States B) Japan C) Saudi Arabia D) Germany E) France