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Do Now 03/13

What is the key factor that has allowed for populations to
grow significantly over the last few decades? How is this
possible?

What has caused fertility rates to drop? Discuss some factors.
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Hunger Games?

If you were worried about Earth’s dynamic changing into the
Hunger Games (fighting for survival), and you were
president or the national leader of your country, what would
you do to ensure that this didn’t happen?

What measures would you take? Why?
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Sort the Lot

In front you, you have a set of diagrams that you must try to
match to a specific country and its description.

Match country, diagram, and description

Work in pairs!
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Today we will…

4.6: I can analyze an age-structure diagram for various
countries and compare them and explain what each diagram
shows about a population’s growth.

4.7: I can discuss the influences certain population groups
might have on other age groups.
What do age diagrams show us about different countries population
growth?
What comparisons can we draw between different countries’ age
groups? What can this tell us about potential growth?
What are some of the causes that effect different age groups?
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Age Structure and
Influences
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Population Age Structure: Growth
and Decline
 The
numbers of males and females in young, middle, and
older age groups determine how fast a population grows
or declines
 Demographers
plot age structure diagrams—
something you will be doing—these show the
distribution of males and females in each age group.

We plot percentages or numbers of males and females
in the population in each of three age categories: prereproductive (0-14); reproductive (15-44); and
postreproductive (45 and up)
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Population Age Structure: Growth
and Decline
Male
Female
Male
Female
Expanding Rapidly
Guatemala Nigeria
Saudi Arabia
Expanding Slowly
United States
Australia China
Prereproductive ages
0–14
Reproductive ages
15–44
Male
Female Male
Stable Japan
Italy Greece
Female
Declining Germany
Bulgaria Russia
Postreproductive ages 45–85+
Fig. 6-11, p. 131
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India
China
Sub-Sahara Africa
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Teens are the Future

The number of people younger than 15 determine what the
country’s population growth will be.

The more teenagers, the more likely the population is to grow
in the future! Birth rates will rise because a large number of girls
will be moving on into their reproductive years!

In developing countries, the percentages of young people are
even higher compared to developed countries like the United
States.

However, the more young people—which in many developing
countries constitute a large proportion—the higher the
unemployment rate. In parts of Latin America, Asia, and Africa,
20-50% of the young group (15-24) are unemployed, thus leading
to social unrest.
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Teens are the Future!
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Quick Check Discussion

What do age diagrams show us about different countries
population growth?

What role do teenagers play in the population? How does having
an overabundance of young people lead to turmoil in countries?

What can you predict about the following population’s growth in the
future?
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Population Groups: Influences

Certain population groups have large influences over others,
depending on what age group they are in.

It’s important to understand how certain age groups may
influence others politically and economically.
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Baby Boom
 Back
in the day…1940s-60’s, the US had a baby boom,
which helped to add around 80 million people to the
population.
 These
individuals, known as baby boomers, tend to make
up half of all adult Americans. This means that the
number of older Americans will grow sharply over the
next 20 years or so.
 This
large proportion of older Americans leads to some
political questions: these individuals usually vote for
specific policies that influence us, the younger generations.
How can we balance the needs of seniors with the needs
of the rest of the population without killing the
economy?!
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Baby Boom
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Baby Boom

As baby boomers retire, this allows for younger people to
have more access and opportunities to jobs that require
technical skills beyond high school and education due to
less competition.

The only problem is that many people in the younger
generation cannot move up to higher professions simply
because the baby boomers still hold these positions
themselves.
 Slow
decline
 Manageable
 Rapid
decline
 Economic problems
 Proportionally fewer young people working
 Labor shortages
+ Stability in the Population
 About
a 7th of the worlds population lived in
countries that were essentially stable or
declining population sizes.
 The
rates of population growth are starting to slow
down in China and India and Iran due to strong
family planning programs.
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Quick Check Discussion
 What
effects do baby boomers have on the rest of
the population?
 How
are young people—like you—going to be
affected?
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In general…

Population Age Diagrams tell us about the shift in our
population over time, which allows us to predict if we will
shrink or grow

The general patterns show us that certain countries are
explanding rapidly, slowly, stable, or declining.

Age groups can have a large effect on others

Teenagers are important in determining population
growth Hunger games: stop teenagers from forming
families in the future?
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Active Practice
 How
has Florida’s population growth played a role in
political influence?
 What
are the main factors that have caused Florida’s
population growth and how might this relate to the
younger demographic group?
 Elaborate
on how Florida’s population growth will
continue to grow. Explain.
 How
do you think this might affect your generation?
Elaborate.