Population Pyramids

 Today in class we use population pyramids to analyze growth (or decline) of fertility, mortality, and migration in cities. The three basic shapes are the Christmas tree, the box, and the cup. The Christmas tree shows a developing nation. The growth rates are usually slow. It has a high birth rate but a short life expectancy rate, some countries that are like this are Bangladesh, and Namibia. The next pyramid we learned about was the box pyramid this is a developed nation, so the growth is slow. It has a low infant mortality rate and long-life expectancy. Some examples are USA, and Sweden. The last one we went over was the cup, this is also a developed nation with negative growth. It has a low birth rate and the population is shrinking, it also has a low life expectancy rate. The examples are Japan, and Italy. 

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