Aphug: De Blij Chapter 2 Terms #2

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Physiological Density

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A measure of population density that is found by dividing the total number of people by the area of ARABLE land.

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Population Composition

Back 2

Aspects that make up a population. These can include sex, age, marital status, and education.

Front 3

Population Density

Back 3

A measure of total population relative to land size.

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Population Distributions

Back 4

Descriptions of locations on the Earth’s surface where individuals or groups live.

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Population Explosion

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The rapid growth of the world’s human population during the past century, attended by evershorter doubling times and accelerating rates of increase.

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Population Pyramid

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This is a visual representation of the composition of a population in terms of age and sex.

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Rate of Natural Increase

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The difference between the number of births and the number of deaths.

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Restrictive Population Policy

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A policy that is now generally enforced by the majority of the world’s governments. This policy ranges from toleration and promotion of birth control to prohibition of large families. China’s “One Child Policy” is an example of this.

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Stage Five

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This is a stage of the demographic transition characterized by a declining population. Birth rates continue to fall and drop below death rates. Death rates remain steadily low.

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Stage Four

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This is a stage of the demographic transition characterized by a decrease in population growth. The birth rates continue to fall while the death rates remain steadily low.

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Stage One

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This is a stage of the demographic transition characterized by low population growth. There are high birth and death rates in this stage.

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Stage Three

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This is a stage of the demographic transition characterized by a population explosion. Birth rates remain high although they begin to fall. Death rates are very low (still decreasing but close to leveling off).

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Stage Two

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This is a stage of the demographic transition characterized by increased population growth. There are high birth rates and declining death rates.

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Stationary Population Level

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A term abbrev. SPL that refers to a theory that the global population will stop growing some time during the 21st century and reach this stage.

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Malthusian Theory

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Thomas Malthus believed that the world’s population was increasing faster than the food supply needed to sustain it. The thought that food supplies grew LINEARLY and that population grew EXPONENTIALLY.

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Total Fertility Rate

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Average number of children born to a woman during her lifetime. A (TFR) of 2.1 or higher indicates a stable population.

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Zero Population Growth

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A state in which a population is maintained at a constant level because the number of deaths is exactly offset by the number of births.

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Ehrlich Theory

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Stanford University Professor Paul Ehrlich predicted worldwide famine in the 1970s and 1980s due to overpopulation, as well as other major societal upheavals, and advocated immediate action the limit population growth. Fears of a “population explosion” were widespread in the 1950s and 1960s, but the book and its author brought the idea to an even wider audience.

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Epidemiological Transition Model

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Process by which the pattern of mortality and disease is transformed from one of high mortality among infants and children and episodic famine and epidemic affecting all age groups to one of degenerative and man-made diseases (such as those attributed to smoking) affecting principally the elderly. It is generally believed that the epidemiological transitions prior to the 20th century (i.e., those in today’s industrialized countries) were closely associated with rising standards of living, nutrition, and sanitation.

Front 20

Boserup’s Theory

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Also known as agricultural intensification, states that population change drives the intensity of agricultural production. Her position countered the Malthusian theory that agricultural methods determine population via limits on food supply.