chapter 9 key terms Flashcards
demography
the study of populations
age structure
the distribution of ages in a specific population at a certain time
survivorship
the percentage of members of a group who are likely to survive to any given age
fertility rate
the number of babies born each year per 1,000 women in a population
migration
the movement of individuals between areas
life expectancy
the average number of years members of a population are likely to live
demographic transition
a model that describes how economic and social changes affect population growth rates
infrastructure
the basic facilities and services that support a community
arable land
land that can be used to grow crops
urbanization
the movement of people from rural areas to cities
least developed countries
countries that show few signs of development
