Chapter 10 Flashcards
demography
the study of the size, composition, and distribution of human populations and the causes and consequences of changes in these characteristics.
population change
an increase or decrease in the size of a population. It is equal to (Births + Immigration) - (Deaths + Emigration)
birth rate
same as crude birth rate
crude birth rate
annual number of deaths per 1,000 people in the population of a geographic area at the midpoint of a given year.
death rate
same as crude death rate
crude death rate
annual number of deaths per 1,000 people in the population of a geographic area at the midpoint of a given year.
doubling time
the time it takes (usually in years) for the quantity of something growing exponentially to double. it can be calculated by dividing the annual percentage growth rate into 70.
rule of 70
doubling time (in years) = 70/(percentage growth rate).
fertility
the number of individuals that occur to an individual women or in a population.
replacement-level fertility
number of children a couple must have yo replace them. the average number for a country or the world usually is slightly higher than 2 children per couple (2.1 in the United States and in 2.5 in some developing countries) because some children die before reaching their reproductive years.
total fertility rate
estimate of the average number of children who will be born alive to a women during her lifetime if she passes through all her childbearing years (ages 15-44) conforming to age-specific fertility rates of a given year. in simpler terms, it is an estimate of the average number of children a women will have during her childbearing years.
life expectancy
average number of years a newborn infant can be expected to live.
infant mortality rate
number of babies out of every 1,000 born each year that die before their first birthday.
age structure
percentage of the population (or number of people of each sex) at each age level in a population.
demographic transition
hypothesis that countries, as they become industrialized, have declines in death rates followed by declines in birth rates.