How does the existence of densely-packed cities help preserve wilderness and rural areas?
A) The people of the wilderness form a barrier against urban dwellers and their ilk in a savage ongoing battle that spans time itself.
B) Cities tend to be separated from rural areas by roads and waterways.
C) Pollution is largely an urban phenomenon, so it tends to occur only near large cities, not rural areas.
D) The fact that populations are unevenly distributed across the face of the Earth allows for areas that are basically empty to exist.
Answer: D) The fact that populations are unevenly distributed across the face of the Earth allows for areas that are basically empty to exist.
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A package falls off a truck that is moving at 30 m/s. Neglecting air resistance, the horizontal speed of the package just before it hits the ground is
A) zero. B) less than 30 m/s but larger than zero. C) about 30 m/s. D) more than 30 m/s. E) more information needed for an estimate
Referring to Figures 10.8.5, 10.86, and 10.87, which countries produce very large amounts of meat, corn, and wheat (the maximum range for each on the given scales)?
A) United State and China B) Brazil and United States C) China and India D) United States and Canada E) China and Brazil
Broadly generalizing, the three primary soil-forming regimes are ____
a. eluviation, illuviation, and alleviation b. laterization, podzolization, and nitrification c. calcification, podzolization, and laterization d. podzolization, eluviation, and illuviation e. laterization, salinization, fertilization
The first Europeans to establish a regime in Africa South of the Sahara were the
A. British B. Portuguese C. Spanish D. French