Population Pyramids

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   Today in class, we watched a TED-Ed Youtube video on our laptops on Population Pyramids. We have talked about them before, but this gave a further explanation. Here is a picture of the current (2019) World Population Pyramid:

Here are the important notes I wrote down when I watched the video:

  • A population pyramid is a visual representation which has males and females on opposite sides.  It shows population in each five-year age interval. (starts from ages 0-4 and ends on age 100 and up)
  • Age intervals are grouped together into pre-reproductive (ages 0-14), reproductive (15-44), and post-reproductive (ages 45 and up).
  • Population pyramids can be very useful when predicting future population trends. You can predict whether a country's population will increase or not.
  • Demographic transition- when a country moves from a pre-industrial society to one with an industrial or post-industrial economy.
  • Countries that have only recently begun the process of industrialization typically see an increase in life expectancy, and a decrease in child mortality as a result of improvements in medicine, sanitation, and food supply.
  • A fall in birth rates can be because of increased education and opportunities for women outside of child-rearing. It can also be caused by a move from rural to urban living.
  • Countries in advanced stages of industrialization can reach a point where both birth rates and death rates are low, and the population remains stable, or even begins to decline.
  • A population pyramid can be useful as a record of the country's past.
   After this, we got our Population and Settlement tests back! We got to review the answers on the first page today, and we could see what we got wrong. I am very happy with my score because I got a 98% on it.

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