Geographers use ________ to represent market areas because of their geometric properties, compared with those of circles and squares
A) octagons
B) hexagons
C) pentagons
D) triangles
E) heptagons
Answer: B
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Early in January the earth is closer to the Sun than at any other time of year. This position is termed:
A) aphelion. B) equinox. C) revolution. D) perihelion. E) albedo.
Primary pollutants from burning coal include all of the following except
a. droplets of sulfuric acid b. sulfur dioxide c. suspended solid particles d. Ozone e. None of the above
The high concentration of iridium at the Cretaceous Tertiary boundary may be attributable to
A. an out flux of iridium from Earth's interior. B. meteorite bombardment. C. a worldwide rise in sea level. D. none of the above
Ocean currents in the Northern Hemisphere tend to rotate:
a. clockwise b. counterclockwise c. in an ocean eddy route d. around the North American Drift