The physical geography of sub-Saharan Africa is best described by
A) numerous mountain ranges which soar to the highest elevations on the planet
B) a series of plateaus and elevated basins
C) a series of rift valleys that traverse the continent from east to west, creating a high
mountain range through the Sahel
D) tropical lowlands that stretch across the continent
E) the presence of a high mountain range that runs the length of the continent, like the
Andes in South America
B) a series of plateaus and elevated basins
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What is the largest source of oil in the ocean?
a. Marine transportation b. Runoff from city streets c. Natural oil seeps d. Waste oil dumped down drains e. Concentrated oil spills (from tankers, storage facilities, drilling platforms)
Which of the following is a common characteristic of carbonate rocks?
A. They do not form cliffs. B. They are commonly reddish. C. They commonly have a dissolved appearance. D. They are commonly black and shiny. E. All of these choices are correct.
A solution has a pH of 5.4. What is its pOH?
A) -8.6 B) -5.4 C) 5.4 D) 8.6
Most of the fresh water on Earth is found in ____
a. glacial ice b. lakes c. the atmosphere d. rivers