AP Human Geography: Population and Migration

Comprehensive practice flashcards covering Chapter 2 (Population and Health) and Chapter 3 (Migration) from Rubenstein's The Cultural Landscape (11th Edition), tailored for AP Human Geography exam preparation.

What four global regions contain approximately two-thirds of the world's population?

East Asia, South Asia, Southeast Asia, and Western Europe.

What physical site and situation characteristics are typical of major global population clusters?

Site characteristics include low-lying elevations, fertile soil, and a temperate climate. Situation characteristics include proximity to an ocean or a river with direct access to an ocean.

What is the geographic distinction between ecumene and non-ecumene?

The ecumene refers to the portion of Earth's surface permanently inhabited by humans. The non-ecumene refers to uninhabited or sparsely settled areas deemed too harsh for permanent occupancy, specifically dry lands, wet lands, cold lands, and high lands.

What is arithmetic density, and how is it calculated?

Arithmetic density is the total number of people divided by the total land area ($\text{Arithmetic Density} = \frac{\text{Total Population}}{\text{Total Land Area}}$). It measures the average distribution of people across an entire territory.

What is physiological density, and what does it measure?

Physiological density is the total number of people supported by a unit area of arable land ($\text{Physiological Density} = \frac{\text{Total Population}}{\text{Arable Land Area}}$). It measures the population pressure placed on farmable land.

What is agricultural density, and what does it indicate about a society's economy?

Agricultural density is the ratio of the number of farmers to the amount of arable land ($\text{Agricultural Density} = \frac{\text{Number of Farmers}}{\text{Arable Land Area}}$). A low agricultural density typically indicates mechanized, capital-intensive commercial farming in developed countries, whereas a high ratio indicates labor-intensive subsistence farming.

How is the Natural Increase Rate ($\text{NIR}$) calculated from Crude Birth Rate ($\text{CBR}$) and Crude Death Rate ($\text{CDR}$)?

It is calculated using the formula $\text{CBR} - \text{CDR} = \text{NIR}$. CBR and CDR are expressed as births or deaths per $1,000$ people, whereas NIR is expressed as a percentage per $100$ people.

What is population doubling time, and how is it calculated?

Doubling time is the number of years needed for a population to double in size at a constant rate of natural increase. It is calculated using the Rule of 70: $\text{Doubling Time} = \frac{70}{\text{NIR}}$

What is the Total Fertility Rate ($\text{TFR}$), and what value represents the demographic replacement level?

TFR is the average number of children a woman will bear during her childbearing years (ages 15 to 49). A TFR of $2.1$ is required to achieve replacement-level fertility (zero population growth over time without migration).

What is the dependency ratio, and which segments of the population are classified as dependents?

The dependency ratio is the number of people who are too young or too old to work compared to the number of people in their productive working years. Dependents include individuals aged $0\text{ to }14$ and individuals aged $65$ and older.

What is the sex ratio, and why do developed countries generally have more females than males?

The sex ratio is the number of males per $100$ females in a population. Developed countries tend to have more females because women generally live approximately 7 years longer than men.

What demographic conditions define Stage 1 of the Demographic Transition Model (DTM)?

Stage 1 is characterized by very high Crude Birth Rates (CBR), very high Crude Death Rates (CDR), and a very low Natural Increase Rate (NIR) with virtually no long-term population growth. No country currently remains in Stage 1.

What historical developments triggered the transition of different regions into Stage 2 of the DTM?

Europe and North America entered Stage 2 around 1750 as a consequence of the Industrial Revolution. Developing regions in Africa, Asia, and Latin America entered Stage 2 around 1950 due to the Medical Revolution.

What changes in vital rates occur when a country transitions into Stage 3 of the DTM?

The Crude Birth Rate (CBR) declines sharply and the Crude Death Rate (CDR) continues to decline at a slower rate, causing the Natural Increase Rate (NIR) to moderate.

What defines Stage 4 of the DTM, and what condition does it establish?

Stage 4 features very low CBR and CDR values that converge, producing little or no long-term growth; this condition is known as Zero Population Growth (ZPG), often associated with women entering the formal workforce and the widespread use of family planning.

What demographic characteristics indicate a possible Stage 5 in the Demographic Transition Model?

A very low CBR that drops below an increasing CDR (due to high elderly dependency), resulting in a negative NIR and an overall population decline.

What was Thomas Malthus's central thesis regarding population growth and food supply?

Malthus theorized that human population increases geometrically (exponentially) while food production increases only arithmetically (linearly), leading to severe food shortages and overpopulation.

How do Esther Boserup and Cornucopian theorists challenge Malthusian theory?

Boserup argued that population pressure stimulates agricultural innovation and higher yields. Cornucopians (such as Julian Simon) assert that human ingenuity and technological development continuously create new resources rather than depleting fixed supplies.

Which landmark 1854 epidemiological investigation is illustrated by this street map?

Dr. John Snow's spatial analysis linking cholera fatalities in London to a contaminated public water pump located on Broad Street.

What causes of death predominate in Stages 3 and 4 of the Epidemiologic Transition Model?

Stage 3 is dominated by chronic, degenerative disorders linked to aging (such as cardiovascular diseases and cancer); Stage 4 features delayed degenerative diseases where medical advancements postpone mortality, alongside lifestyle health challenges such as obesity.

What three factors explain the potential emergence of Stage 5 in the Epidemiologic Transition?

1. Microbial evolution and resistance to antibiotics and insecticides; 2. Poverty and unsanitary living conditions preventing access to medical care; 3. Increased global connectivity through aviation, enabling infected individuals to travel abroad before exhibiting symptoms.

How are the geographic terms mobility, circulation, and migration differentiated?

Mobility is the all-encompassing term for all forms of physical movement. Circulation refers to short-term, repetitive, or cyclical movement (such as commuting or seasonal guest work). Migration refers to a permanent relocation to a new home.

What are two core principles of migration distance identified by E.G. Ravenstein?

1. The majority of migrants travel only short distances and remain within the same country; 2. Long-distance international migrants typically move to major centers of economic activity.

What migratory behavior characterizes Stage 2 of Wilbur Zelinsky's Migration Transition Model?

High rates of international emigration combined with substantial interregional migration moving from rural farming communities to rapidly growing urban industrial centers.

What are the distinctions among a refugee, an internally displaced person (IDP), and an asylum seeker?

A refugee is forced to migrate across an international border to escape persecution or armed conflict and cannot safely return. An IDP is displaced by similar threats but has not crossed an international boundary. An asylum seeker has arrived in another country seeking legal recognition as a refugee.

What does the concept of place utility represent in migration studies?

Place utility is a measure of an individual's satisfaction with a specific location based on past experience or anticipated future economic, social, or environmental rewards.

What historical forced political migration in United States history is depicted on this map?

The forced removal of Native American nations during the 1830s to federal reservations, including the Cherokee Trail of Tears.

What were the primary geographic source regions for each of the three major eras of immigration to the United States?

1. 17th and 18th centuries: Great Britain and Africa (forced enslaved laborers); 2. Mid-19th to early 20th centuries: Europe (initially Ireland and Germany, shifting to Northern/Western Europe, and later Southern/Eastern Europe); 3. Late 20th to early 21st centuries: Latin America (led by Mexico) and Asia.

What is the operational difference between step migration and chain migration?

Step migration is a progression of smaller, incremental moves from an origin to an ultimate destination (such as moving from a farm to a town, then to a suburb, then to a metropolis). Chain migration occurs when individuals move to a specific location because relatives or members of the same ethnic group previously established themselves there.

What historical demographic pattern in the United States is represented in this map?

The steady westward and southward shift of the U.S. center of population ('center of population gravity') from Maryland in 1790 toward southern Missouri by 2010.

How did national government initiatives prompt large-scale interregional migration in Brazil and China?

Brazil relocated its federal capital from coastal Rio de Janeiro to interior Brasília to encourage population redistribution into the interior. China saw approximately 100 million people migrate from the rural interior to eastern coastal cities driven by economic incentives and factory employment.

What is counterurbanization, and in what U.S. region has it been most visible?

Counterurbanization is net migration from urban and suburban areas into rural communities driven by lifestyle preferences and natural amenities; it has been particularly prominent in the Rocky Mountain states (Colorado, Idaho, Utah, and Wyoming).

How has the primary nature of intervening obstacles to migration evolved over the modern era?

Historically, intervening obstacles were predominantly physical and environmental barriers (oceans, deserts, mountains); today, they are primarily political, legal, and bureaucratic obstacles (passports, entry visas, quotas, and border enforcement walls).

What is brain drain, and how do financial remittances help offset its consequences?

Brain drain is the large-scale emigration of highly skilled, talented, and educated individuals from developing nations. Remittances—money transferred back home by emigrant workers—provide financial resources to origin communities that help counterbalance the economic loss of educated talent.

How did the Immigration Act of 1965 alter the immigration policy framework created by the 1920s U.S. Quota Acts?

The 1921 Quota Act and 1924 National Origins Act established national-origin quotas that favored European migrants while restricting Asian and Southern/Eastern European immigration. The Immigration Act of 1965 abolished national-origin quotas and replaced them with hemisphere limits prioritizing family reunification and skilled employment.

What demographic and cultural irony exists in contemporary European anti-immigrant sentiment?

European emigrants historically diffused European languages, Christianity, arts, and political systems across the entire globe throughout the colonial era, yet many Europeans today oppose immigration out of fear that their cultural identity and heritage will be altered by incoming migrants.