The total number of live births per year per 1,000 people in a society is the
A) crude birth rate.
B) life data rate.
C) natural increase rate.
D) total fertility rate.
E) new birth rate.
Answer: A
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The pattern of immigration to the United States over two centuries shows that
A. Europe have always been the primarily source region for immigrants. B. No immigrant population yet equals the number of slaves brought from Africa in the 18th and 19th centuries. C. at different times, immigrants tended to come from one region more than others. D. wars overseas have not affected the patterns of immigration.
Why do humid tropical regions have only small variations in temperature throughout the year?
A) The canopy of trees in the rain forest shade the ground and reflect light all the time. B) The cloud cover and rain do not allow the temperatures to rise or fall significantly. C) The winds associated with these systems rapidly redistribute the heat. D) The location of this climatic region is limited to an area where the solar radiation does not vary significantly. E) The constant humidity maintains a relatively uniform temperature.
Define "spatial autocorrelation."
What will be an ideal response?
As pure water approaches its freezing point, the density decreases. Why does this happen?
A) The water compresses into ice. B) The hydrogen bonds become rigid, allowing it to expand slightly. C) The hydrogen bonds break as the molecules compress. D) Ice takes up a smaller surface area than liquid water.