What is the Earth's greatest distance from the sun?
A) Apogee
B) Perigee
C) Aphelion
D) Perihelion
C
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Maintaining sustainable human exploitation of ecosystem capital will be increasingly difficult because of
A) over-reliance on grains and other plants as a significant portion of the human diet. B) expanding number of viral and bacterial human diseases. C) growing pressure from human population on Earth. D) changing temperature and rainfall patterns.
Which of the following produces a tidal current?
A) Both ebb tides and flood tides B) Both neap tides and spring tides C) Ebb tide D) Flood tide E) Spring tide
Girls wearing gym shoes win in a tug-of-war against boys wearing socks on a smooth floor because the girls are able to
A. enjoy a psychological advantage over boys. B. exert more tension on their rope. C. exert more force against the slippery floor. D. none of the above
An organization that coordinates the interests of producers is a
A. market B. business C. cartel D. council