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Agriculture density
The ratio of the numbers of farmer to the total amount of arable land (land suitable for agriculture)
Arable Land
Land that is good for agriculture.
Arithmetic density
The total number of people divided by the total land area
census
A complete enumeration of a population
Crude Birth rate (CBR)
The total number of births in a year for every 1,000 people alive in a society
Crude death rate (CDR)
The total number of deaths each year for every 1,000 people alive in the society
Demographic Transition
The process of change in a society's population from a condition of CBR and CDR and low rate of natural increase to a condition of low CBR and CDR, low rate of natural increase, and higher total population
demography
the branch of sociology that studies the characteristics of human populations
dependency ratio
the number of people under the age 15 and aver the age 65 compared to the total number of people active in the labor force.
doubling time
the number of years needed to double a population , assuming a constant rate of natural increase
ecumene
The portion of earth's surface occupied by human settlement
Elderly support Ratio
the number of people (ages 15-65) divided by the number of persons over 65
epidemiologic transition
The process of change in the distinctive causes of death in each stage of the demographic transition
epidemiology
the branch of medical science dealing with the transmission and control of disease
industrial revolution
the transformation from an agricultural to an industrial nation
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
life expectancy
an expected time to live as calculated on the basis of statistical probabilities (social, economic, and medical conditions)
Maternal mortality rate
the annual number of female deaths per 100,000 live births from any cause related to or aggravated by pregnancy or its management.
Natural Increase Rate (NIR)
The percentage of growth of a population in a year, computed as the CBR - the CDR
overpopulation
too much population
pandemic
an epidemic that is geographically widespread; occurring throughout a region or even throughout the world
Physiological Density
The number of people over a unit area of arable land
population pyramid
A bar graph that represents the distribution of population by age and sex
Sex ratio
The number of males per 100 females in the population
Total fertility rate (TFR)
The average number of children a women will have throughout her childbearing years.
Zero population growth (ZPG)
A decline of total fertility rate to the point where the NIR equals 0
Note 
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