Human Population Dynamics
A review of the CAPT Embedded Task
GHS revised Greewich PPT
World Population Growth 1750-2000
(in millions)
Human Population Growth
Although the human population as a whole is growing at an
amazing rate, different populations of people are growing at
different rates.
We can compare different
countries to see these
differences.
In this activity we will compare
three different countries…
United States
Afghanistan
Italy
Population Pyramids
To the right is a
population pyramid
based on a makebelieve population.
To compare different countries populations, we can use a population pyramid.
Population Pyramids can…
Compare males vs. females in a
population
Compare different age
groups in a population
Let’s review...
1. What is the most populated age group in this population?
2. Predict what age group will be the most populated in 15 years.
3. About how many children (what %) in this population are under the age of 5?
How many are female?
Let’s review...
1. What is the most populated age group in this population?
The most populated age group is those between 20 and 24 years in age.
2. Predict what age group will be the most populated in 15 years. Assuming that
there is not a major growth period in this population in the next 15 years, the
group that is currently 20-24 years old will be in the 35-39 age group.
Let’s review...
How many of them are female?
Looking on the left side of the
pyramid in the 0-4 age bracket,
about 6% of those under age 5 are
female.
3. About how many children in this
population are under the age of 5?
Approximately 12.5% of the
population is 0-4 years old.
So back to our previous question. How
do these three countries compare?
United States
Afganistan
Italy
U.S. vs. Afghanistan
Afghanistan
United States
Now, let’s compare countries again…
Rapid vs Slow Growth
What do you notice
about the populations
from these countries?
Do you notice that
Afghanistan has more
people in the lower
age brackets?
The U.S. has more
people in the middle
age bracket.
Which do you think
represents Rapid
Growth? Slow?
RAPID GROWTH “Pyramid”
RAPID GROWTH
• Underdeveloped or developing countries
• Wide base, narrow top = young population
• High Birth Rates
SLOW GROWTH “Boxy”
“Pear Shaped” “Middle Bulge”
SLOW GROWTH
• Developed Countries
• # young is less than # of middle aged
• Wide center portion “pear shaped”
Now, let’s compare countries again…
Based on these graphs,
what is one issue that
each country will have
to face in the future??
Now, let’s compare countries again…
Based on these graphs,
what is one issue that each
country will have to face in
the future??
Afghanistan: Afghanistan is
clearly a growing country.
It has proportionally many
more younger people. The
country will have to supply
more and more resources
like food and energy for its
growing population.
Now, let’s compare countries again…
Based on these graphs,
what is one issue that each
country will have to face in
the future??
U.S.: The U.S. is a stabilized
population with little
growth. It will have an
aging middle class in years
to come. Because the
average age in the U.S.
continues to rise, it may
have a difficult time
supporting its large
number of aging citizens.
Now lets look at Italy…
To the right is a population
pyramid from the year
2000 and a projected
(predicted) pyramid for
the year 2025.
How does Italy differ from
the first two countries?
What is expected to
happen it Italy in the next
16 years?
Now lets look at Italy…
To the right is a population
pyramid from the year 2000
and a projected (predicted)
pyramid for the year 2025.
How does Italy differ from
the first two countries?
Italy is a country who’s
population is on a decline.
What is expected to happen
it Italy in the next 16 years?
The number of young
people in Italy is expected
to continue to decrease
over the next decade.
NEGATIVE GROWTH
NEGATIVE GROWTH
• Death Rate Exceeds the Birth Rate
• Middle Age Migration/Job Opportunities
Now lets look at Italy…
What are some issues that
Italians face in the future?
Now lets look at Italy…
What are some issues that
Italians face in the future?
Italians face a declining
population. That means a
smaller work force and a
shrinking population of the
Italian culture and heritage.
Summary… test yourself
To the right is a comparison of
France and Kenya. Answer the
following questions:
1. What is a potential concern for
each country for the future?
2. What is a major difference
between the two populations in
terms of life expectancy? Predict
why.
3. Label each country as “A
growing country” or “A
stable/declining country”.
4. One country is growing
exponentially. Which one?
Summary… answers
FRANCE
1. What is a potential concern for
each country for the future?
France is a stabilized population
with little growth. It will have
an aging middle class in years to
come. Because the average age
in France continues to rise, how
will the population support its
large number of aging citizens?
2. What is a major difference
between the two populations in
terms of life expectancy?
France has many more people
growing into their 80’s and even
90’s compared to Kenya.
This may be because France has
better health care for the sick
and elderly.
3. Label each country as “A growing country” or “A
stable/declining country”. This country has a
stable/declining population.
4. One country is growing exponentially. Which one?
(Not this one.)
KENYA
Summary… answers
1. What is a potential concern for
each country for the future?
Kenya clearly is a growing
country. It has proportionally
many more younger people
than France. The country will
have to supply more and
more resources like food and
energy for its growing
population.
2. What is a major difference
between the two populations in
terms of life expectancy?
Kenya has many fewer people
growing into their 70’s and even
80’s compared to France.
This may be because Kenya has
poorer health care and fewer
nursing programs for the
elderly.
3. Label each country as “A growing country” or “A
stable/declining country”. This country has a
growing population.
4. One country is growing exponentially. Which one?
Kenya is definitely growing exponentially.
Human Population Pyramid: Make your own and analyze your data
Be prepared to discuss your answers
Open Note Quiz on Population Next Class
Begin Population Pyramids Lab
You can research population
pyramids, and other info having
to do with population for any
country worldwide. Visit the
website below:
http://www.census.gov/ipc/www/idb/