Population Explosion!
Title - How is the population changing?
Date: 04/10/12.
Lesson Objective – To look at how and why
population is changing?
Take a look at the population
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http://www.worldometers.info/worldpopulation/
http://www.poodwaddle.com/clocks/world
clock/
Write down an estimate of what you think
the worlds population will be at the end of
this lesson and now briefly discuss with
your group why.
Key words that may influence a changing population – can you match them
up?
Birth rate
Natural increase
Death Rate
MEDC
LEDC
is the number of births minus the number
of deaths.
means the amount of babies being born
per 1000.
More Economically Developed Country
Less Economically Developed Country
means the amount of people dying per
1000.
Q: Choose one of the key words and explain with examples how this may
affect a change in a population of a country?
Quick fact: The difference between the
number of births and the number of
deaths is called the _____increase in
populations.
Your Turn
Study the graphs on the next 3 slides showing
world population trends over time periods.
In a short paragraph describe world population trends.
To describe the graphs do 3 things:
1. Describe the general trend of the graph and support by
quoting data from the graph
2. Acknowledge exceptions (sometimes called anomalies) to the
general trend and support with data from the graph
3. The third thing is to support your descriptions with data from the
graph
The world just keeps on growing! Population dynamics is all about change
Use this diagram to give two
country examples of population
increase, balance and decrease.
Watch the 5 min clip and answer the questions
below.
http://www.youtube.com/watch?v=RxJWh3u8fcU
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1. What factors are contributing to the worlds
continued population growth?
2. In which areas is population growing and in
which areas is it decreasing and how has this
changed over time?
3. How can we explain differing population
trends in different parts of the world?
4. What are the effects of population growth on
the planet as a whole?
So why do populations grow?
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1.
2.
3.
4.
5.
6.
7.
Make a list, why you think the population is growing?
Children have to look after their parents
Religion
Culture (men are more dominant in LEDC)
Family plan to send 1 kid to get educated and the rest
to work (family Planning?)
Poor family planning (how does a poor family feed 8
kids? Education, clothing,)
Half the kids die, due to unaffordable health, lack of
education, clean water..
Family plan for the educated child to get a well paid
job (such as??) via their country or migration to a
MEDC.
Effects of Population change
are????????
E
S
E
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Q/Think about your answers to question 4,
make a copy of this and in your groups decide
where each answer should go and….justify!!
Plenary
Q1/ Has the population increased over the years?
Q2/ Why do you think the population has
increased over the years? Explain.
Q3/ In some countries the birth rate is high,
explain why this may be?
Q4/ In some countries the Death rate is high,
explain why this may be?
Key words???? What do they
mean???? Homework
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Death rate
Infant Mortality Rate
Ageing Population
Replacement Rate
Population Pyramid
Women’ Rights
Contraception
Emigration
Poverty
Barriers to Migration
Key words???? What do they
mean????
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Birth Rate
One Child Policy
Immigration
Life Expectancy
Push factor
Population Growth
Anti Natal Policy
Migrant worker
Declining Population
Demographic transition Model
Birth rates are high
because:
Birth rates are low
because:
No birth control or family planning
Disease and plague
Famine, un certain food supplies or poor diet
Many children are needed to work on the land
Children are regarded as a sign of virility (manhood)
Religious beliefs may encourage large families
Little medical science, few doctors, hospitals etc.
So many children die in infancy that parents tend to produce more children
Fall in deaths
Fall in birth rates
Improved medical care – vaccinations, hospitals, doctors, new drugs
and scientific inventions
Family planning – contraceptives, abortion, sterilisation
A low infant mortality rate therefore people have less children
Improved sanitation and water supply
Improved food production (quality and quantity)
Improved transport to move food, doctors etc.
Increased industry meaning fewer workers are needed
Increased desire for material things and less desire for large families
Women have become free; can follow careers rather that just have
children
Copy out the box below showing
how we calculate population
growth.
Key words we will need for this unit – can you match them up?
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Birth rate means the amount of babies
being born PER 1000.
Death Rate means the amount of people
dying PER 1000.
Natural increase is the number of births
minus the number of deaths.
MEDC More Economically Developed
Country
LEDC Less Economically Developed
Country