| A | B |
|---|
| demography | the study of population patterns and change |
| population size | all the people of a particular area |
| population density | the number of people in a defined area such as a square mile |
| population distribution | the pattern, or spread, of people in a given area |
| birth rate | the number of births each year per 1,000 people |
| death rate | the number of deaths each year per 1,000 people |
| migration | the movement of people |
| fertility rate | the average number of children per woman |
| more developed nations | a country with a highly developed economy, including significant industrial and service sectors of the economy |
| less developed nations | a fairly poor country with an agriculturally-based economy |
| population pyramid | pyramid-shaped diagram that shows the age and male/female distribution of a population, with the youngest represented by a rectangle at the base and the oldest by one at the top |
| dependent population | those people that rely on others for support for the goods and services they consume, usually the very young and very old |
| immigration | the process of entering one country to take up permanent or semi-permanent residence |
| emigration | the process of leaving one country to take up permanent or semi-permanent residence |
| push factors | factors that push people out of one place to another place |
| pull factors | factors that pull, or attract, people to move to a place |
| refugee | a person who has been forced to leave his/her country in order to escape war, persecution or natural disaster |
| urbanization | the movement of people from rural to urban areas |
| megacity | a city with over 10 million people |
| slum | a run-down area of a city with inadequate housing and lack of services such as water and sanitation |
