2 Population National Geographic - 7 billion National Geographic - Are You Typical?
3 Key Terms Demography – The statistical study of human populations. Population – The total number of people living in a given area.Population Density – The average number of people living in a given area. (persons per square mile)Arithmetic v. Physiologic
4 Birthrate – Number of live births each year per 1,000 people. Death Rate – Number of deaths each year per 1,000 people.Immigrants – People who move into a countryEmigrants – People who leave a country to live elsewhere
5 Pull Factors – Things that attract people to live in a new location. Push Factors – Things cause people to leave a location.Urbanization – the movement of people from the countryside to cities (growth of cities)Rural – Of, or relating to the countryside.
17 Population PyramidsShows the age & sex distribution of a populationShows the history of a country’s population growth—Ex. Baby Boom Generation in U.S.
18 A country’s population pyramid can show 1 of 3 types of growth Rapid growth-wide at the base (Ex: Haiti) …looks like a true pyramidSlow growth- straight up and down or a little wider at base than top (Ex: US)Negative growth-broader at top than bottom (Ex: Germany)
22 BrainstormingReasons why some countries have high birth rates? (Have lots of children?)Reasons for high death rates?Reasons why some countries have low death rates? (Have few or no children?)Reasons for low death rates?