| natural resource | | metals and other minerals that cannot be replaced once they are used up |
| fossil fuels | | way of life |
| renewable resource | | highly developed culture, usually with organized religion and laws |
| free enterprise | | country in the process of becoming industrialized |
| socialism | | number of deaths each year for every 1,000 people |
| service industry | | farm that produces only enough to support a family's needs |
| urbanization | | measure of quality of life based on income and material possessions |
| standard of living | | economic system in which goverment sets economic goals and may own some businesses |
| hydroelectric power | | percentage of adults in a society who can read and write |
| developed country | | power produced by the heat of the sun |
| emigrate | | tendency of a country's people to move from rural areas to cities |
| pollution | | to move from one's native country to another country |
| refugee | | person who has had to flee to another country for safety from disaster or danger |
| developing country | | number of children born each year for every 1,000 people |
| famine | | average number of people living in a square mile or square kilometer |
| culture | | business that provides services to people rather than producing goods |
| acid rain | | process by which knowledge and skills spread from one area to another |
| pesticide | | chemical used to kill insects and other pests |
| demographer | | lack of food, affecting a large number of people |
| cultural diffusion | | precipitation in which water carries large amounts of chemicals, especially sulfuric acid |
| literacy rate | | anything from the natural environment that people use to meet their needs |
| birth rate | | resource that is placed naturally or can be grown quickly |
| nonrenewable resource | | country that is industrialized rather than agricultural |
| solar energy | | basis of a market economy in which people start and run businesses to make a profit with little government intervention |
| language family | | scientist who studies population |
| population density | | electric power generated by falling water |
| subsistence farming | | group of languages that comes from a common ancestor |
| death rate | | group of nonrenewable mineral resources-coal, oil, natural gas- formed in the eath's crust from plant and animal remains |
| civilization | | putting impure or poisonous substances into land, water, or air |
