Transcript ch-15-population-pyramids

Population Pyramids
How do population changes affect a
country’s future?
You don’t need your
workbook yet. Checkout
the next few slides about
population pyramids to
learn about them.
1. What does the vertical
or up and down axis
represent?
2. How many years does
each age band
represent?
3. Which age band
represents the most
years?
4. In which age band are
you? Your siblings? Your
mother/father? Your
grandparents?
5. What does the
horizontal axis
represent?
1. Think about it: Find
the bar that
represents your age
and sex. What
percent of the total
U.S. population is in
the same category as
you?
a.
b.
c.
d.
4.5%
3.5%
2%
2.5%
What is a population pyramid?
Age always on the
vertical axis
Governments use
them to decide how
to best use funds: If
you have a lot of
children, should
government money
go to building
schools or health
care for the elderly?
Population pyramids
are used to get a
“picture” of a
population: are
there more young or
old people? Males or
females?
Percent of
population always
on the horizontal
axis
A series of bar graphs that shows the age
groups by sex of a population.
Use page 110 to do the next few
slides.
Which one is
Lawrence, KS?
Use these photographs to do the
chapter 15 “Preview ,” p. 110
Which one is
Jacksonville,
NC?
Use these photographs to do the
chapter 15 “Preview ,” p. 110
Which one is
Yuma, AZ?
Use these photographs to do the
chapter 15 “Preview ,” p. 110
Do the Geoterms on page 111.
Vocab Assignment
Match the word to the picture. Write the letter of the picture next to the corresponding
word on page 111.
demography
dependency ratio
life expectancy
replacement rate
A
B
total fertility rate
=
C
D
Population Density Map
Dilemma One: A Shrinking Population
(Page 112)
Italy has a
problem: its
population is NOT
growing. The
bulge in the
middle of this
population
pyramid means
there are more
older people than
young.
Dilemma One: A Shrinking Population
(Page 112)
1. Look at page 112 in your workbook.
2. Find #1 and answer it in your workbook. The
task is to give several reasons why you think a
country might have negative population growth.
In other words, what might cause a country to
lose population or have less babies?
Dilemma One: A Shrinking Population
(Page 112)
Look at page 112 in your workbook. Find #2 and
use the next slides (taken from section 15.4)
to take notes on what causes negative
population growth.
Dilemma One: A Shrinking Population
(Page 112)
• Women are
having fewer
children than the
2.1 replacement
rate.
Dilemma One: A Shrinking Population
(Page 112)
• Because it
costs a lot of
money to
raise a child,
families are
having fewer
children.
Dilemma One: A Shrinking Population
(Page 112)
• Since it is
difficult to
find
childcare,
families
are having
fewer
children.
How much is rent for the average American and what is this
saying about the cost of child care vs rent?
Dilemma One: A Shrinking Population
(Page 112)
The higher the
level of
education of
women in a
country, the
lower the
birthrate.
• Young women who focus on their education or career
tend to have fewer children.
Dilemma One: A Shrinking Population (p112)
Look at #3 on page 112. Use the following
three slides to learn about the problems
caused by negative population growth
and complete the sentence.
Dilemma One: A Shrinking Population (p112)
Check out the next three slides to answer #3.
Less children means
that less schools,
teachers and child
care workers are
needed. Schools and
businesses related to
children lose jobs and
abandon buildings.
Dilemma One: A Shrinking Population (p112)
Less babies
means less
workers 30 years
later. Businesses
may leave the
country to find
more skilled
workers,
affecting the
economy.
Dilemma One: A Shrinking Population (p112)
Less babies
means less
soldiers 30 years
later. A country
may find it
difficult to recruit
enough people
for its military.
Dilemma One: A Shrinking Population (p112)
4. Rank the plans
listed in your
workbook on
p.112 from
strongest (1) to
weakest (5).
Again, which
plan will best
solve Italy’s
negative
population crisis?
Dilemma One: A Shrinking Population (p112)
• Once you have ranked the plans, complete #5.
Be sure to explain why you believe your
rankings are right.
Dilemma Two: An Aging Population
(Page 113)
Spain has a
problem: its
population is NOT
growing and
they’re going to
have TOO MANY
old people. The
bulge in the
middle of this
population
pyramid means
there are more
older people than
young.
Dilemma Two: An Aging Population
(Page 113)
1. Look at page 113 in your workbook.
2. Find #1 and answer it in your workbook. The
task is to give several reasons why you think
a country might have more older people than
young.
Dilemma Two: An Aging Population
(Page 113)
Look at page 113 in your workbook. Find #2 and
use the next slides (taken from section 15.6)
to take notes on what a population to age.
Dilemma Two: An Aging Population
(Page 113)
• A population
ages when there
are more old
people than
young ones.
Two: An
Aging
Population
(Page 113)
• A population
ages when
people begin
living longer
(rising life
expectancy)
Dilemma Two: An Aging Population
(Page 113)
• A drop in
birth rate
causes a
population
to age
Dilemma Two: An Aging Population
(Page 113)
• A baby boom after an event such as a war can result in
a large generation.
Dilemma Two: An Aging Population (p113)
Look at #3 on page 113. Use the following
three slides to learn about the problems
caused by negative population growth
and complete the sentence.
Dilemma Two: An Aging Population (p113)
Check out the next two slides to answer #3.
It leads to economic problems
when the government
provides a pension (Social
Security).
Note: A government pension
is when the govt. gives money
to old people so they don’t
have to work in their old age.
However, if there are a lot of
old people and few young
people, taxes have to go up to
make difference.
Dilemma Two: An Aging Population (p113)
It leads to economic
problems when the
government provides
health care for old
people.
Dilemma One: An Aging Population (p112)
4. Rank the plans
listed in your
workbook on
p.113 from
strongest (1) to
weakest (5).
Again, which
plan will best
solve Spain’s
aging population
crisis?
Dilemma Two: An Aging Population (p113)
• Once you have ranked the plans, complete #5.
Be sure to explain why you believe your
rankings are right.