3rd ESO Demography

1. demography
a POPULATION’s approachment

2. demography is the science
about populationWhat I will learn?
. World’s population distribution
. Where we live and why.
. Population rates.
. Population pyramids.

3. out of
order!

4. a small planet for a lot of
people

5. activities
the video explains the evolution of world’s population since 1 BP
Answer the following questions:
1. Where was the population concentrated at the beginning?
2. which continent has been always high habited?
3. Which kind of food makes it possible?
4. Are the inside of the continents highly habited?
5. and coastal areas?
6. Which areas will be uninhabited in future?

6. Imagine that only 100 people live on the earth?
If 100 people lived on earth….

7. ACTIVITIES. 1
THE VIDEO SHOWS THE AVERAGES OF POPULATION ON EARTH
Suposing that live on earth 7.000.000.000 approximately:
1. How many people live in Asia?
2. And in Europe?
3. How many are Christians?
4. How many speak Chinese?
5. How many have clean water?
6. How many sleep under roof?

8. One More!
COMPTADOR MUNDIAL

9. Why we live where we live.
WARM UP!
Activity 2:
Make a list of the factors and reasons why the planet is overpopulated
in some areas, and why is uninhabited in other parts of the planet.

10. Populatio
n
density

11. ION
DENSITY
To analyse the number of people
concentrated in an area. Allows us to
make comparisons between territories
or countries of different sizes.
Total population of a territory
Total surface area of the territory
expressed in square
kilometres(km2)

12. Population density
Very low populated areas: density less than 10 inhab/km2
Low populated areas: density between 10 inhab/km2 and 50
hab/km2
Populated areas: density between 50 inhab/km2 and
100 inhab/km2
Very High populated areas: More than 100 inhab/km2

13. An unequal world
ACTIVITY 3.
1. Which hemisphere is more
populated?
2. Which areas are more uninhabited?
Esmenta una zona per continent
3. Find three overpopulated countries.
4. Calculate the population density of
your classroom.
World’s population by country

14. Populatio
n
structures

15. How we count population?
Using maths of course!
Do not worry it’s easy, but first…
What we should count?

16. Natural movements
of populationThis movements are produced by
biological factors:
BIRTHS AND DEATHS

17. BIRTH
RATE
IS THE NUMBER OF BIRHTS THAT
TAKE PLACE IN A POPULATION
DURING ONE YEAR. It is expressed
by (0/00)
IT COULD BE HIGH OR LOW
DEPENDING ON THE
COMPARISON BETWEEN OTHER
PLACES OR YEARS
Number of births in one year
Total population
x1000

18. DEATH
RATE
IS THE NUMBER OF DEATHS THAT
TAKE PLACE IN A POPULATIOND
DURING ONE YEAR. THE CRUDE
RATE IS CALCULATED TO KNOW
WETHER IS HIGH OR LOW. It is
expressed by (0/00)
Nombre de defuncions
Població total
Number of deaths in one year
Total population
x1000

19. The infant
mortality
rate
Complements the deaths rate and
more accurately indicates the degree
of development of a place. Less
developed countries typically have a
high infant mortality rate. It is
expressed by (0/00)
Nombre de defuncions
Població total
Number of deaths of infants under one year
old in one year
Total number of births in one year
x1000

20. general
fertility
rate
Relates the number of births in a
place to women who live there of a
certain age profile. To calculate the
rate, it is considered that women of
reproductive age are between 15 and
49 years old. It is expressed by
(0/00)
Number of live births in one year
Number of women between 15 and 49
years old
x1000

21. EXPECTA
NCY
Is an indicator related to the death
rate. This measure which is an
estimated average, expresses the
number of years that a person can
generally expect to live for from the
moment of their birth. This indicator is
also linked to development. In less
developed countries, life expectancy
is below 50.

22. -activity 4
1. Search the internet. What country shows the highest life
expectancy in the world?
2. What position does Spain have?
3. What country has the last position?
4. Find information about this country: birth rate,death rate,
infant mortality rate, number of children per woman.

23. Rate of
natural
increase
Is the difference provided by the
births and deaths.
POSITIVE NATURAL INCREASE
NEGATIVE NATURAL INCREASE
If the rate of natural increase is
positive, population grows. If the
natural increase is negative, the
number of inhabitants decreases. It
could be considered zero if the
result is not significant.
BIRTH
RATE
DEATH
RATE

24. Activities 5
Crude birth rate Crude deaths rate
Looking to the maps, which conclusions can you find out?

25. Building
pyramids

26. Biological structure of the
populationThe biological structure of the population is its composition according to age
and sex (men and women).
In terms of age we can distinguish three groups:
. Child population (0-14 years old)
. Adult population: (15-64 years old)
. Elderly population: (+65 years old)

27. Bell shape
It corresponds to a young population in which
the group of elderly people has increased
because the age of death is higher

28. Triangle shaped
It reflects a very young population whith a high
percentage of the poopulation under 14 years
old and a very small group of elderly people
1. High birht rate
2. High infancy mortality rate
3. Life expectancy below 50

29. Urn shaped
It shows an ageing population in which the
group of young people has been reduced of
fewer birhts
1. Controlled births
2. High life expectancy.

30. EXPANSIVE REGRESSIVESTABLE

31. About us!

32. The demographics of spain

33. 1. Which autonomous communities show the largest and smallest rates of
natural increases?
2. What factors explain the current Spanish low natural increase?
ACTIVITY 6

37. A WORLD
IN
MOVEME
NT

39. MIGRATION!
IS THE MOVEMENT OF PEOPLE FROM ONE PART OF THE PLATE TO
ANOTHER. THE DEPARTURE OF PEOPLE FROM ONE PLACE IS CALLED
EMIGRATION, WHILE THE ARRIVAL OF PEOPLE IS CALLED
IMMIGRATION.

40. MIGRATI
ON
IT COULD BE POSITIVE OR
NEGATIVE, AND IS THE
DIFFERENCE BETWEEN THE
ARRIVALS AND DEPARTURES OF
PEOPLE IN ONE PLACE
IMMIGRANTS EMIGRANTS
TO CALCULATE THE ACTUAL INCREASE
IN POPULATION, WE NEED TO TAKE INTO
ACCOUNT NET MIGRATION AND THE
NATURAL INCREASE
Actual increase= natural increase + net migration

41. Causes of migration
ACTIVITY 7
1.Make a list of the reasons do you think people decide to move to
another place

42. Causes of
migration
SOCIAL CAUSES
ECONOMIC CAUSES
POLITICAL CAUSES

43. ECONOMIC CAUSES
Emigrants move in search of richer areas with more and better jobs.
The profile of these emigrants is very diverse; they can be highly qualified
professionals or have jobs that do not required specialisation.

44. Social causes
These motivations are linked to economic causes. The host country or area offers
more opportunities for education, health and leisure.
People also emigrate escaping from insecurity or seeking reunification with their
families.

45. Political causes
There are people who emigrate to escape wars or political regimes in which they
are persecuted for religious, ideological or ethnic reasons
If these emigrants receive legal protection in their host country they are known as
political refugees.

46. ACTIVITY 8: ASKING OUR
NEIGHBORSYou should discover at least five people from the high school who has migrated
once in their live.
Ask them the reasons why they had moved and classify it into
SOCIAL CAUSES
ECONOMIC CAUSES
POLITICAL CAUSES

47. Refugees.
Getting
away the
war.