Population

Population is the number of people living in an area. A city's population is the number of people living in that city. In Spain we have a population of 46,7 million people.

The population in the world is now very high. It is around 7 billion and it’s increasing constantly. Watch this web of the world's population. 

Population density

Population density is the number of people per square kilometer. Commonly this may be calculated for a county, city or a country.

Fertility Rate

Fertility rate is the total number of children born in a family.

Life expectancy

The number of years in average that we can live. In modern societies with health care, vaccines and better eating habits and medicines, people can expect to live more years.

Ethnic Group

A group of people that have in common a language, background culture, or some history or even some genetic characteristics.

Pyramid Graph

It represents the population of a country by age and gender. It can give us valuable information of how the population is going to be in the future.

Here are some examples: