| A | B |
|---|
| population | total number of people |
| population distribution | the way a population is spread out over an area |
| demography | the science that tries to explain how populations change and why population distribution is uneven |
| population density | the average number of people per square mile or kilometer |
| birthrate | number of live births each year per 1,000 people |
| deathrate | number of deaths each year per 1,000 people |
| migration | people's movement from one place or region to another |
| immigrants | people who move into one country from another |
| urbanization | the movement of people to cities and the growth of cities |
| rural | countryside |
| urban | areas in cities and nearby towns |
| economy | a system in which people make, exchange, and use things that have value |
| producers | owners and workers |
| consumers | people who buy and use products |
| capitalism | economic system in which private individuals own most businesses |
| communism | economic system in which the central government owns farms, factories, and offices |
| developed nations | nations with more industry and more advanced technology |
| developing nations | nations with fewer industries and simpler technology |
| governments | organizations that set up and enforce laws |
| state | a region that shares a government |
| dependencies | regions that belong to another state |
| nation-states | states that are independent of other states |
| city-states | small city-centered states |
| empires | states containing several countries |
| constitutions | set of laws that define and often limit the governments power |
