Population Pyramids

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Population Pyramids
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What is a population pyramid?

• a graph showing the distribution of a population
  by sex and age.

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Examples

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What are population pyramids used for?

• To describe the population characteristics of
  different societies
• To predict future growth trends.

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Think.

• How many children would you have if you had to
  run a farm with just you and your family?
• Does that still happen?
• What will the population pyramid for those places
  look like?

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Developing CountryRapid Population Growth

• This pyramid represents countries that have not
  gone through the industrial revolution.
• Families have 5 or more children per family.

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Which one is closest to what the United States
pyramid would look like?
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Ding Ding Ding if you picked this one you are
correct!!

• This pyramid represents countries that have
  already gone through the industrial revolution.
• Families usually have 3 or less children per
  family.

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Developing Country Rapid Population Growth
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Newly Industrialized Country
This represents countries that are transitioning
from developing to developed.
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Newly Industrialized countries
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Developed CountrySlow Population Growth
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Developed - Stage 5
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Words you need to know!!!!

• Birthrate- The ratio of total live births to
  total population in a specified community or area
  over a specified period of time.
• Death Rate- The ratio of total deaths to total
  population in a specified community or area over
  a specified period of time.
• Population Distribution- Where do the people live
  with in an area.
• Population Density- How many people live in a
  given area.
• Infant Mortality Rate- the number of infant
  deaths per 1000 live births
• Life Expectancy-how long are people expected to
  live
• Literacy Rate- What percentage of people can read
  and write.