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Population Density

A measurement of the number of people per given unit of land.

Arithmetic Population Density

The total number of people divided by the total land area.

Physiological Population Density

The number of people per unit of area of arable land, which is land suitable for agriculture.

Population Distribution

Description of locations on Earth's surface where populations live.

Dot Map

Maps where one dot represents a certain number of phenomenon, such as population.


Term used to designate large coalescing supercities that are forming in diverse parts of the world.


A complete enumeration of a population.

Doubling Time

The time required for a population to double in size.

Population Explosion

The rapid growth of the world's human population during the past century, attended by ever-shorter doubling times and sccelerating rates of increase.

Natural Increase

Population growth measured as the excess of live births over deaths; does not reflect either emigrant or immigrant movements.

Crude Birth Rate (CBR)

The number of live births yearly per thousand people in a population.

Demographic Transistion

High birth rates and death rates are followed by plunging death rates, producing a huge net population gain, this is followed by the convergence of birth rates and death rates at a low over-all level.

Stationary Population Level

The level at which a national population ceases to grow.

Population Composition

Structure of population in terms of age, sex and other properties such as marital status and education.

Population Pyramids

A bar graph representing the distribution of population by age and sex.

Infant Mortality Rate

The total number of deaths in a year among infants under one year old for every 1000 live births in a society.

Child Mortality Rate

A figure that describes the number of children that die between the first and fifth years of their lives in a given population.

Life Expectancy

A figure indicating how long, on average, a person may be expected to live.


Immune system disease caused by the HIV which over a period of years weakens the capacity of the immune system to fight off infection so that weight loss and weakness set in and other affliction such as cancer or pneumonia hasten an infected person's demise.

Chronic Diseases

Generally long-lasting afflictions now more common because of higher life expectancies.

Expansive Popluation Policies

Government policies that encourage large families and raise the rate of population growth.

Restrictive Popluation Policies

Government policies designed to reduce the rate of natural increase.

Crude Death Rate (CDR)

The number of deaths yearly per thousand people ina population.

Eugenic Population Policies

Government policies designed to favor one racial sector over others.

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