Chapter 2: Population and Health Flashcards
Demography
The scientific study of population characteristics.
Overpopulation
A situation in which the number of people in an area exceeds the capacity of the environment to support life at a decent standard of living.
Ecumene
The portion of Earth’s surface occupied by permanent human settlement.
Pandemic
An epidemic that occurs over a wide geographic area and affects a very high proportion of the population at the same time.
Arithmetic density
The total number of people divided by the total land area.
Physiological density
The number of people per unit area of arable land, which is land suitable for agriculture.
Agricultural density
The ratio of number of farmers to the total amount of arable land.
Crude birth rate (CBR)
The total number of live births in a year for every 1,000 people alive in a society.
Crude death rate (CDR)
The total number of deaths in a year for every 1,000 people alive in a society.
Natural increase rate (NIR)
The percentage growth of a population in a year, computed as the crude birth rate minus the crude death rate.
Doubling time
The number of years needed to double a population, assuming a constant rate of natural increase.
Total fertility rate
The average number of children a woman will have throughout her childbearing years.
Life expectancy
The average number of years an individual can be expected to live, given certain social, economic, and medical conditions. Life expectancy at birth is the average number of years a newborn infant can expect to live.
Infant mortality rate (IMR)
The total number of deaths in a year among infants under 1 year of age for every 1,000 live births in a society.
Demographic transition
The process of change in a society’s population from a condition of high crude birth rate and death rates and low rate of natural increase to a condition of low crude birth and death rates, low rate of natural increase, and higher total population.
Agricultural revolution
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