APHG: 2.1 - 2.2

scientific study of population charactistics

demography

the number of people in an area exceeds the capacity of the environment to support life at a decent standard of living

overpopulation

portion of Earth's surface occupied by permanent human settlement

ecumene

total number of people divided by total land area

arithmetic density

number of people supported by a unit area of arable land

ration of the number of farmers to the amount of arable land

agricultural density

total number of live births in a year for every 1,000 people alive in the society

CBR: Crude Birth Rate

total number of deaths in a year for every 1,000 people alive in the society

CDR: Crude Death Rate

percentage by which a population grows in a year

NIR: National Increase Rate

number of years needed to double a population

doubling time

measure the number of births in a society

TFR: Total Fertility Rate

the annual number of deaths of infants under 1 yr. of age, compared with total live births

IMR: Infant Mortality Rate

average number of years a newborn infant can expect to live at current mortality levels

life expectancy