The document discusses population trends in developed and developing countries. It states that until the 19th century, population growth was slow in developed nations due to high mortality rates. From the 19th century onward, population growth increased due to advances in health care and agriculture. The population experienced rapid expansion in the early 20th century. After mid-century, population growth declined in developed nations as birth rates decreased and life expectancy increased. Currently, population growth is low or even negative in developed countries, while less developed countries continue to see rapid population increases. The world population is projected to reach 12 billion by 2100.

1. POPULATION

2. WHAT IS POPULATION?
 All the people who live in the same country or place.

3. HOW MANY PEOPLE ARE THERE IN THE
WORLD?

4. EVOLUTION OF THE POPULATION IN
DEVELOPED COUNTRIES
 Global population has not growth at the same pace.

5. EVOLUTION OF THE POPULATION IN
DEVELOPED COUNTRIES
Until the 19th century, population growth was very
slow. A lot of people were born but a lot of them died
from hunger and epidemics.

6. EVOLUTION OF THE POPULATION IN
DEVELOPED COUNTRIES
From the 19th century onwards, the population started to grow faster,
because of advances in sanitation and health care. Moreover,
technological improvements in agriculture and industry produced
more food.
In the first half of the 20th century there was a demographic explosion.

7. EVOLUTION OF THE POPULATION IN
DEVELOPED COUNTRIES
After the mid-20th century, population growth started to
decrease in richer countries, because less people were born and
less people died.

8. EVOLUTION OF THE POPULATION IN
DEVELOPED COUNTRIES
Nowadays, population growth in developed countries is very low
or even negative (when there are more deaths than births).

9. EVOLUTION OF THE POPULATION IN
LESS DEVELOPED COUNTRIES
However, nowadays the populations of poorer countries
continue to grow rapidly.

10. Now it´s your turn!
Try to explain the
graph with your own
words.
EVOLUTION OF THE WORLD POPULATION

11. It has been estimated that by the end of the 21st
century, the world will have about 12 bilion
in habitants.
Explain the
changes in
the line
graph

12.  Page 47:
 Ex. 1 and 4
 Page 56
 Ex, 1

13. POPULATION DENSITY
 The distribution of global population is not equal.

14. POPULATION DENSITY
 What is population density?
 Do exercise 2 on page 47
 Do exercise 2 on page 56

15. POPULATION DENSITY
Interprete
the map key.

16. POPULATION DENSITY

17. POPULATION DENSITY
 The distribution of global population is not equal.
Interprete
the map and
the graph.

18. POPULATION DENSITY

19.  Page 47:
 Ex. 3, 4, 5 and 6