3.1.3 Age Sex Pyramids - PowerPoint PPT Presentation

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3.1.3 Age Sex Pyramids

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3.1.3 Age Sex Pyramids Age/Sex Pyramids Demographer usually plot % or # of male and females in the total population in each of three categories: Pre-reproductive (0 ... – PowerPoint PPT presentation

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Title: 3.1.3 Age Sex Pyramids


1
3.1.3 Age Sex Pyramids
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Age/Sex Pyramids
Show the proportion of the population (or of each
sex) at each age level.
3
  • Demographer usually plot or of male and
    females in the total population in each of three
    categories
  • Pre-reproductive (0-14)
  • Reproductive (15-44)
  • Post-reproductive (45 and up)

4
How does Age Structure Affect Population Growth?
  • Age/Sex Pyramids help demographers determine the
    potential for future growth of a specific age
    group as well as that of the total population .
  • The overall shape of the pyramid indicates
    potential growth.
  • Age structure diagrams not only reveal a
    populations growth trends, but can point to
    future social conditions.

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(No Transcript)
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  • Why would a countrys leaders want to know the
    proportion of the population in different age
    groups?
  • What difference does the age of the people in a
    country make?
  • What kinds of products do young people use?
  • Older people?
  • Is it important for a government leader or
    planner to know the age of population they are
    serving?

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Rapid Growth Guatemala Nigeria Saudi Arabia
Slow Growth United States Australia Canada
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Zero Growth Spain Austria Greece
Negative Growth Germany Bulgaria Sweden
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Developing Countries
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Developed Countries
85 80-85 75-79 70-74 65-69 60-64 55-59 50-54 45-4
9 40-44 35-39 30-34 25-29 20-24 15-19 10-14 5-9 0-
4
Male
Female
Age
300
200
100
0
100
200
300
Population (millions)
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CANADA
UNITED STATES
INDIA
AUSTRALIA
MEXICO
CHINA
Fig. 46.15, p. 827
12
Age Structure Diagram U.S.
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