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chapter four
ap human geo
| Question | Answer |
|---|---|
| demographic balancing equation | a simple equation to describe the future population of a region of any scale. |
| immigrants | people who moved into the country. |
| emigrants | .people who moved out of the country. |
| crude birth rate | the number of live births per year for each 1,000 people. |
| total fertility rate | the average number of children who would be born per woman of that group in a country. |
| life expectancy | the average number of years people live. |
| infant mortality rate | the number of children who pass before their first birthday. |
| sewer systems | cities began to install sewer systems, protecting water supplies from contamination and thus increasing life expectancy. |
| water and waste systems | cities reduced the number of rodents that fed on the waste and often carried disease |
| vaccines | a shot to prevent diseases |
| antibiolics | used to cure people from a type of disease |
| better medical care | improved medical procedures have also extended life expectancy |
| population doubling time | the exact duration required for an exponentially growing population to double in size. |
| rate of natural increase | The percentage at which a country’s population is growing or declining, without the impact of migration |
| demographic transition model | shows five typical stages of population change that countries experience as they modernize |
| demographic momentum | the tendency for a population to continue growing or shrinking for decades after its fertility rate reaches replacement level, caused by a lag from past age structures |
| epidemiological transition model | explains how major causes of death and population health patterns shift as a society develops economically, socially, and technologically. |
| Boserup theory | population growth is the primary driver of agricultural innovation |
| neo-Malthusians | an updated belief that rapid population growth will outpace all Earth's vital resources—such as water, energy, and clean air—and lead to environmental collapse and social conflict |
| Gender Preference | a cultural valuation of male children over female children that heavily shapes demographic patterns, sex ratios, and family planning |
| Revision of One-Child Policy | China revised and eventually ended its One-Child Policy to combat severe demographic aging, a shrinking workforce, and declining birth rates |
| pronatalist policies | government measures designed to encourage citizens to have more children and increase the national birth rate |
| demographic balancing equation | a basic formula used to calculate total population change over a specific period by tracking births, deaths, and migration |
| Total fertility rate | measures the average number of children a woman would have over her lifetime based on current age-specific birth rates |
| dependency ratio | a demographic measure that compares the non-working-age population (dependents) to the working-age population |
| dependent population | individuals who are not of working age and rely on the working-age population for financial and social support |