Which feature of the geographic grid is the basis for time zones?
A. central parallels
B. standard time
C. prime meridian
D. equator
E. central meridian
C
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Discuss the problems that occurred while trying to determine longitude. How was the longitude problem finally solved?
Which of the following most accurately describes population trends in the United States during the latter half of the 20th century?
A) Large cities annexed nearby towns so they could grow and provide places for their residents without those residents having to move to the suburbs or rural areas. B) A large migration from inner cities to suburbs occurred in the latter half of the 20th century, as people were attracted to new lower-density housing. C) Having grown weary of high crime rates and urban squalor, a mass migration of city dwellers into rural areas occurred in the years following World War II and the Korean War. D) A large migration into the inner cities occurred after World War II as the economy recovered from the Depression and people were more able to live in areas close to where they worked.
The original large continental mass containing all of the present continents prior to separation millions of years ago has been named ________
A) Laurasia B) Gondwanaland C) Pangaea D) North America E) Eurasia
Plinian eruptions are so explosive they can impact the upper atmosphere. Indicate whether the statement is true or false