| A | B |
|---|
| age structure | distirbution of ages in specific pop at a certain time |
| demography | the study of populations |
| emigration | movement of individuals out of a population |
| infrastructure | basic facilities /services that support community |
| arable land | land that can be used to grow crops |
| least-developed countries | highest birth rates |
| survivorship | % of members of grop that are likely to survive to given age |
| demographic transition | model-describes how pop changes may occur |
| urbanization | people moving from rural areas into cities |
| total fertility rate | average # of babies woman gives birth to over lifetime |
