AP Human Geography: Population, Migration, and Development

Comprehensive vocabulary flashcards covering key terms and concepts for Unit 2 (Population & Migration) and Unit 7 (Development) of the AP Human Geography curriculum, including economic sectors, Rostow's modernization stages, and Wallerstein's World-Systems theory.

Arithmetic Density

The total number of people divided by the total land area, measuring the average population concentration across a given region.

Physiological Density

The number of people per unit area of arable (farmable) land, reflecting the agricultural pressure a population exerts on productive soil.

Population Density

The measurement of the number of individuals living within a specified unit of land area.

Population Distribution

The spatial pattern and geographical arrangement showing where people live across Earth's surface.

Carrying Capacity

The maximum population size of a species that an environment can sustain indefinitely without depleting or degrading available resources.

Infant Mortality Rate (IMR)

The annual number of deaths of infants under one year of age per $1,000$ live births in a given year.

Development

The continuous process of improving the material, social, and economic conditions of people through the diffusion of technology, knowledge, and wealth.

Primary Economic Sector

The sector of an economy focused on the direct extraction of raw natural resources from the Earth, including agriculture, mining, fishing, and forestry.

Secondary Economic Sector

The economic sector that transforms, manufactures, and processes raw materials into finished, value-added goods.

Tertiary Economic Sector

The service-oriented sector of an economy that provides consumer, commercial, and professional services, such as retail, banking, transportation, and hospitality.

Quaternary Economic Sector

The knowledge-based sector of the economy centered on information management, research and development (R&D), education, and technology.

Quinary Economic Sector

The highest-level decision-making economic sector, consisting of top executives and policymakers in government, major corporations, universities, and science.

Rostow's Stages of Economic Growth

A five-stage modernization theory asserting that all countries pass through a linear sequence of development: traditional society, preconditions for take-off, take-off, drive to maturity, and age of high mass consumption.

Wallerstein's World-Systems Theory

A structuralist dependency model proposing that the global economy is divided into a three-tiered hierarchy (core, semi-periphery, and periphery) characterized by dynamic, exploitative relationships.

Core (World-Systems Theory)

Wealthy, industrialized, and technologically advanced countries that generate high profits, control global markets, and exploit peripheral regions for raw materials and labor.

Semi-Periphery (World-Systems Theory)

Intermediate, industrializing nations with diversified economies that exploit peripheral regions while simultaneously being economically exploited by core nations.

Periphery (World-Systems Theory)

Less-developed countries characterized by low industrialization, low literacy, and labor-intensive economies that supply raw resources and cheap labor to the core and semi-periphery.

Gross National Income (GNI) per Capita

The total market value of all goods and services produced by a country's citizens and businesses, both domestically and abroad, divided by the total population.

Human Development Index (HDI)

A composite United Nations indicator measuring overall socioeconomic development based on three dimensions: life expectancy at birth, average years of schooling, and GNI per capita.

Gender Inequality Index (GII)

A United Nations metric quantifying female disadvantage across three dimensions: reproductive health (maternal mortality and adolescent birth rates), empowerment (educational attainment and parliamentary seats), and labor market participation.

Microloans / Microlending

The provision of very small financial loans directly to low-income entrepreneurs, particularly women in developing nations, to promote grassroots business development.

Demographic Transition Model (DTM)

A demographic model illustrating the historical shift of a country from high crude birth and death rates to low birth and death rates across five distinct stages of socioeconomic modernization.

Epidemiological Transition Model (ETM)

A model describing the changing causes of human mortality across the stages of the DTM, progressing from infectious diseases and famine to degenerative and chronic ailments.

Malthusian Theory

The theory by Thomas Malthus positing that human population grows exponentially while food production increases arithmetically, inevitably leading to societal catastrophe, famine, and war without preventative checks.

Crude Birth Rate (CBR)

The total annual number of live births per $1,000$ people alive in a population.

Crude Death Rate (CDR)

The total annual number of deaths per $1,000$ people alive in a population.

Total Fertility Rate (TFR)

The average number of children a woman is projected to have throughout her childbearing years, typically considered ages $15\text{--}49$.

Rate of Natural Increase (RNI)

The annual percentage rate of population growth or decline calculated by subtracting CDR from CBR and dividing by $10$, excluding net migration: $\text{RNI} = \frac{\text{CBR} - \text{CDR}}{10}$.

Population-Doubling Time

The projected number of years required for a given population to double in size at its current constant rate of natural increase, estimated using the Rule of $70$ ($70 / \text{RNI}$).

Population Pyramid

A graphical representation showing the age structure and sex distribution of a specific population at a particular point in time.

Dependency Ratio

The numerical ratio comparing the non-working dependent population (under age $15$ and over age $64$) to the productive working-age population (ages $15\text{--}64$).

Push Factors

Unfavorable political, environmental, social, or economic conditions that compel individuals to emigrate from their current location.

Pull Factors

Attractive social, economic, political, or environmental characteristics that draw migrants to relocate to a specific new destination.

Intervening Obstacles

Environmental, physical, political, or economic barriers that hinder, complicate, or prevent a migrant from completing their intended journey.

Intervening Opportunities

Closer or alternative positive opportunities that arise along a migration route, causing a migrant to settle before reaching their original destination.

Refugees

Individuals who have been forced to cross international borders due to well-founded fears of persecution, armed conflict, or violence, and cannot safely return home.

Internally Displaced Persons (IDPs)

Individuals forced to flee their homes due to violence, persecution, or natural disasters who remain displaced within the domestic borders of their own country.

Asylum Seekers

Migrants who have crossed an international border seeking legal recognition and protection as refugees, but whose claims have not yet been formally adjudicated.

Chain Migration

A migration process wherein prospective migrants choose a specific destination because relatives, friends, or members of the same ethnic group have previously settled there.

Step Migration

A gradual migration process occurring in successive stages from a rural area, through intermediate towns and smaller cities, to a major urban metropolitan area.

Transhumance

The seasonal movement of pastoralists and livestock between fixed highland pastures during the summer and lowland valley pastures during the winter.

Pronatalist Policy

A government policy or financial incentive system designed to encourage childbearing and raise national fertility and birth rates.

Sustainable Development

Development strategies that satisfy current human needs without compromising the capacity of future generations to meet their own resource and environmental requirements.

Sustainable Development Goals (SDGs)

A collection of $17$ interconnected global objectives established by the United Nations in $2015$ designed to eradicate poverty, reduce inequality, protect ecosystems, and secure prosperity by $2030$.