OBSERVE THESE PICTURES

1965 2012

1970

2010

1970-1980

2012

YOUR SCHOOL!!

1968

1977

2010

POPULATION

POPULATION: Number of people who live in an area.

There are different ways to classify the population

AGE LOCATION ECONOMIC

ACTIVITY

We can classify the population by age

AGE

Young people

Children and adolescents (< 18)

Adults people who are sixteen to sixty-four ( 16-64)

Seniors people who are sixty-five or older (>65)

There are two types of population:

Rural populations Urban populations

LOCATION

People live in small villages or towns

People live in large cities

ECONOMIC ACTIVITY

Active Population

People work and earn a salary.

People who are unemployed but they are looking for a job.

Inactive Population

People don´t work and don´t earn a salary (not legal working age, people who are ill and so on).

We can classify the population by economic activity:

POPULATION CHANGES

The number of inhabitants in a place changes continually.

Some people:

are born die

and

arrive or leave to another countries..

• Census is a survey of all the people in the country.

If we look at the birth rates, the death rates and the inmigration and emigration we will see that the population can increase or can decrease.

Positive natural increase

More people are born than die. The population grows.

Negative natural increase

More people died that are born. The population decreases.

MIGRATION

There are people who leave their homes to live in another place. This is called migration

Why do they leave their homes?

Natural causes: Floods, Social factors: War, political

earthquakes, droughts and religious problems or some problems to find a job.

TYPES OF MIGRATION

Internal migration: People leave their homes within the same country.

Why people leave their homes?

The number of jobs in rural areas decreases.

Young people find better opportunities to study, work and live in cities.

International migration: people migrate from one country to another

WHAT´S THE DIFFERENCE?

– Emigrants: People who leave a country.

– Immigrants: People who arrive in another country.

POPULATION DISTRIBUTION

Some countries and regions are more populated than others because of

job opportunities,

a healthy climate and

good services.

Population density shows us how populated an area is. We calculate the population density by dividing the total number of inhabitants by the size of the area they live in.

High population density Low population density