Population
Transcript of Population
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