Components of Population Change

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Syllabus Content for Core 1
1. Define Carrying capacity
2. What is the carrying capacity of our
classroom?
3. What is the carrying capacity of your home?
4. What kinds of problems arise when carrying
capacity is exceeded by population and/or
consumption by the limited population?
Pop. J- Chart

J-Chart … Why is it
called this?
 How long did it take
the population of the
world to reach 1
billion?
○ 1800
 Have the time
intervals for doubling
the population
changed (doubling
time)?
• Where are most of
the world’s new
inhabitants coming
from?
• AKA core and
periphery
From the Vocab



What’s the reason for the population increase?
What are birth rates (crude birth rates)?
What are death rates (mortality rates)?
 Natural change = #Births - # deaths
 Total Population change = #births – #deaths + #net migration …
net migration (M) = immigration (inside) – emigration (out, exit)
 P= B-D +/- M

Infant and child mortality rates?
 Infant =
 Child =




Fertility rate? vs. total fertility rate? See table 4, pg. 10 in
book
Life expectancy?
Rate of natural increase?
Replacement level fertility?
TFR
=.3481*5=1.74
44

What
might
cause
fertility
rates to
decline?
Population Momentum
Population momentum refers to
population growth at the national level that
would occur even if levels of childbearing
immediately declined to replacement level.
 For countries with above-replacement
fertility (greater than 2.1 children per
woman), population momentum
represents natural increase to the
population.
 It takes generations to move through and
die off for population growth to subside

Demographic Transition Model
Developed World
Height of Industrial
Revolution &
(DTM)
of the
Urbanization in Western
Societies (1800’s)
Agricultural Revolution
in England(1700’s)
Developed World
Underdeveloped
World (primitive
societies
Developing
World– Ancient to Modern
Time
Demographic Transition (DTM) in
Developing World



See pg. 8 in the book
Many places in developing world, birth rates were
already much higher, so too were death rates in
stage 1
Advancement of western medicine & technology
through physical and economic colonization brings
about rapid reduction in death rate…
 though pandemics like AIDS and Ebola can change this for
some countries


Some countries like India and China had high
population bases to begin with
Fall in fertility has been steeper and more rapid in
many developing countries.
Population Pyramids

Why is this called a
population pyramid?
 They present info. on
age-sex structure of a
society

Ea. bar represents a
cohort of 5 years
US Population Pyramid
Mexico &
China
Nigeria & France
India
1.
2.
3.
4.
5.
6.
7.
8.
9.
Can you tell population size on pyramids with only percentages
graphed?
Of the six graphs (Mexico, India, Nigeria, China, France, and US) ,
which look most like pyramids?
What does that indicate about their population growth rates?
What factors would change the shape of the pyramids in the future?
Looking at the pyramids, which country appears to have the slowest
rates of population growth? How can you tell?
In which countries do children make up the biggest percentage of
the population?
Some cultures have traditionally favored boy children over girl
children (as can been seen in the pyramids for India and China).
Why might it be advantageous to have boys rather than girls in
these countries? What are some consequences that may arise if a
generation has a gender imbalance?
If you had a business in Nigeria and wanted to capitalize on your
information about the Nigerian population, what would you sell?
How would you expect the Mexican pyramid to look if you graphed
it in 40 years from now?
Relationship of Demographic Transition to
Pop. Pyramids
Italy stats
& Pyramid
Rwanda
stats &
Pyramid
UK Stats &
Pyramid
India
Stats &
Pyramid
Let’s Summarize Factors that Affect Population Growth
1. Modern medicine and hygiene
2. Education (especially women’s education)
3. Industrialization and urbanization (how tech. savvy is the place)
4. Economic development (do people have enough, steady work)
5. Government policy
6. Role of women in society (do they stay at home or work)
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