Population Pyramids
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4 Terms
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Population Pyramid
A histogram representing a population's age and sex distribution
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Expansive Population Pyramid
Triangular: wide base, narrow top; shows high birth rate and fast population growth.
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Constrictive Population Pyramid
A cup-shaped pyramid with a narrow base, showing low birth rates and an aging population; common in developed countries with long life expectancy.
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Stationary Population Pyramid
A rectangular pyramid with similar numbers across age groups, showing stable birth and death rates; common in highly developed countries.
Note 
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