POPULATIONPOPULATION: Number of people who live in an area. There are different ways to classify the population ECONOMIC AGE LOCATION ACTIVITY
AGE We can classify the population by ageYoung people Adults SeniorsChildren and people who are people who areadolescents sixteen to sixty- sixty-five or older(< 18) four ( 16-64) (>65)
LOCATIONThere are two types of population: Rural populations Urban populations People live in small People live in large villages or towns cities
ECONOMIC ACTIVITYWe can classify the population by economic activity: Active Population Inactive Population People work and earn a People don´t work and don´t salary. earn a salary (not legal People who are unemployed working age, people who are but they are looking for a job. ill and so on).
POPULATION CHANGESThe number of inhabitants in a place changescontinually. 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 Negative natural increaseMore people are born than More people died that aredie. The population grows. born. The population decreases.
MIGRATIONThere are people who leave their homes to live inanother place. This is called migration Why do they leave their homes?Natural causes: Floods, Social factors: War, politicalearthquakes, droughts and religious problems or some problems to find a job.
TYPES OF MIGRATIONInternal migration: People leave their homes withinthe 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 onecountry to another
WHAT´S THE DIFFERENCE?– Emigrants: People who leave a country.– Immigrants: People who arrive in another country.
POPULATION DISTRIBUTIONSome countries and regions are more populated thanothers 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 thetotal number of inhabitants by the size of the area theylive in.High population density Low population density