What is a Primate City, and what are the economic pros and cons of primacy?

A primate city has more than twice the population of the second-largest city and exerts overwhelming national economic, political, and cultural dominance (e.g., Paris, London, Mexico City, Bangkok). • Pros: Agglomeration economies, global business hub, concentrated infrastructure. • Cons: Uneven regional development, brain drain from provinces, severe urban congestion and pollution.

What is John Borchert's Model of Urban Evolution (Transportation Epochs)?

Borchert categorized American urban growth into five epochs shaped by transport innovations: 1. Sail-Wagon Epoch (1790–1830): Coastal ports, waterways, horse carts. 2. Iron-Horse Epoch (1830–1870): Steam engine, regional rail networks. 3. Steel-Rail Epoch (1870–1920): Transcontinental national rail grid, heavy industry. 4. Auto-Air-Amenity Epoch (1920–1970): Internal combustion engine, highways, airports, suburbanization. 5. High-Technology Epoch (1970–present): Telecommunications, digital service economy, global logistics.

What is Wilbur Zelinsky's Migration Transition Model?

Zelinsky linked migration patterns to the Demographic Transition Model: • Stage 1: High daily/seasonal mobility for subsistence (pastoralism). • Stage 2: Heavy international emigration and rural-to-urban internal migration. • Stage 3 & 4: High internal urban-to-suburban migration and net international immigration. • Stage 5: Nearly all intraregional and interurban circulation.

What is Time-Space Compression (David Harvey)?

The phenomenon whereby modern transportation (jets, high-speed rail) and telecommunications (internet, satellite) dramatically reduce the time needed to interact across space, effectively making the world feel smaller and accelerating globalization.

How did Nicholas Spykman's Rimland Theory (1942) counter Mackinder's Heartland Theory?

Spykman argued that the coastal perimeter of Eurasia (the 'Rimland'—Western Europe, Middle East, South and East Asia) holds naval and land access, rich population, and industrial resources. He asserted: 'Who controls the Rimland rules Eurasia; who rules Eurasia controls the destinies of the world.' This formed the basis for the US Cold War Containment policy.

How does the Bid-Rent Theory explain urban and agricultural land prices?

Formulated by William Alonso based on von Thünen, Bid-Rent Theory states that real estate price and demand decrease as distance from the Central Business District (CBD) increases. Retail and commercial firms bid the highest for central locations to maximize access to customers, while residential and industrial users settle further away.

How does Homer Hoyt's Sector Model (1939) modify Burgess's urban structure?

Hoyt argued that cities develop not in uniform rings, but in wedge-shaped sectors or corridors radiating outward along transportation routes (rail lines, highways, rivers). High-income residential sectors expand along desirable scenic routes or high ground, while industrial and low-income sectors align along transport spines.

What is the primary argument of Thomas Malthus's Essay on the Principle of Population (1798)?

Malthus claimed that human population grows exponentially (geometrically: 1, 2, 4, 8, 16...), whereas food production increases only arithmetically (1, 2, 3, 4, 5...). Without voluntary preventive checks (moral restraint, late marriage), positive checks (war, famine, disease) will catastrophically reduce population to sustainable subsistence levels.

What is the core premise of Johann Heinrich von Thünen's Agricultural Land-Use Model (1826)?

Von Thünen modeled agricultural land use in an isolated state around a central market, showing that land use is determined by the balance between land rent (bid-rent) and transportation costs. More perishable and transport-heavy goods locate closest to the market, while less perishable and extensive goods locate farther away.

What are the core concepts of Chauncy Harris and Edward Ullman's Multiple Nuclei Model (1945)?

Harris and Ullman proposed that a city lacks a single dominant CBD; instead, it develops around several distinct nodes or nuclei of activity (e.g., ports, business parks, universities, airports). Activities cluster due to mutual benefit (agglomeration) or incompatibility (e.g., heavy industry repelling high-income housing).

What is the Griffin-Ford Model of Latin American City Structure (1980)?

A model showing a traditional CBD connected to a commercial spine lined with high-end amenities and high-class residential areas, terminating at an elite mall. Surrounding the center are concentric zones of decreasing socio-economic status: the Zone of Maturity, In Situ Accretion, and an outer peripheral belt of squatter settlements (favelas/barriadas) and a periférico highway.

What is the difference between Site and Situation in human geography?

• Site: The absolute, physical characteristics of a location (e.g., elevation, climate, soil quality, water access, terrain). • Situation: The relative location of a place in reference to other places, features, trade routes, or geopolitical entities (e.g., Singapore's strategic position on the Strait of Malacca).

What are the core ideas of Halford Mackinder's Heartland Theory (1904)?

Mackinder argued that the key to global geopolitical dominance lies in controlling the 'Heartland'—the vast, resource-rich, landlocked Eurasian interior (inaccessible to naval power). His famous maxim: 'Who rules East Europe commands the Heartland; who rules the Heartland commands the World-Island; who rules the World-Island commands the world.'

What is Walter Christaller's Central Place Theory (1933)?

A theory explaining the spatial distribution, size, and number of human settlements based on economic functions. It represents market areas as interlocking hexagons to eliminate unserved spaces and overlaps, organizing settlements into a hierarchical urban system.

How does the core-periphery model apply at a national or subnational scale?

Within a single nation, economic investment, governance, and advanced services concentrate in a core region (e.g., SE England, Northeast US, São Paulo), while peripheral regions provide food, minerals, and cheap migrant labor, often suffering from underdevelopment and political neglect.

How does Environmental Determinism differ from Possibilism?

• Environmental Determinism: The outdated 19th-century belief that the physical environment (climate, topography) strictly dictates and controls human culture and social development. • Possibilism: The modern geographic perspective that the physical environment limits human choices, but humans possess the agency and technology to adapt and shape their environment.

How did Ester Boserup challenge Malthusian theory regarding agricultural production?

Boserup argued that population growth acts as a catalyst for agricultural innovation and intensification rather than famine ('necessity is the mother of invention'). As population density increases, farmers adopt more intensive cultivation techniques, shorter fallow periods, irrigation, and multi-cropping to raise yields.

List the concentric rings of von Thünen's Agricultural Model from the center outward.

1. Central City / Market. 2. Ring 1: Market gardening and intensive dairying (perishable, high transport cost). 3. Ring 2: Forest / Timber production (heavy, expensive to transport fuel/building material). 4. Ring 3: Extensive field crops and grains (less perishable, lighter per unit value). 5. Ring 4: Livestock ranching and grazing (animals can walk to market, requires vast cheap land).

What are the five stages of W.W. Rostow's Stages of Economic Growth Model (1960)?

1. Traditional Society (subsistence agriculture, rigid social structure). 2. Preconditions for Takeoff (commercial agriculture, infrastructure development, investment). 3. Takeoff (rapid growth in limited leading manufacturing sectors, urbanization). 4. Drive to Maturity (diffusion of modern technology across all industries, diversified economy). 5. Age of High Mass Consumption (shift to consumer durables, services, high disposable income).

What is the Rank-Size Rule for urban settlements, and what is its formula?

Proposed by George Zipf: in a given country, the population of the $n$-th largest city is inversely proportional to its rank: $P_n = \frac{P_1}{n}$, where $P_1$ is the largest city's population. For example, the 2nd largest city is half the size of the 1st, and the 4th largest is one-fourth the size (characteristic of developed federal systems like the US).

What does the Gravity Model predict about spatial interaction between two places?

Derived from Newton's law of gravitation: the spatial interaction ($I_{ij}$) between two cities $i$ and $j$ is directly proportional to the product of their populations ($P_i \times P_j$) and inversely proportional to the square of the distance between them ($d_{ij}^2$): $I_{ij} = \frac{P_i P_j}{d_{ij}^2}$.

In Christaller's Central Place Theory, distinguish between 'Range' and 'Threshold'.

• Range: The maximum distance people are willing to travel to purchase a good or service (small for low-order goods like milk; large for high-order goods like specialized surgery or luxury cars). • Threshold: The minimum market population required to support a business or central place function profitably.

How does Immanuel Wallerstein's World Systems Theory divide the global capitalist economy?

Wallerstein divides countries into a dynamic three-tier hierarchy based on labor exploitation and capital accumulation: • Core: High income, advanced technology, capital-intensive production, exploits periphery (e.g., US, Germany, Japan). • Semi-Periphery: Intermediate industrializing nations that exploit the periphery while being exploited by the core (e.g., Brazil, China, India). • Periphery: Low income, low skill, raw material exporters, dependent on core capital (e.g., Chad, Bangladesh).

What is Alfred Weber's Least Cost Theory (1909) of industrial location?

Weber proposed that secondary manufacturing industries minimize total operational costs by optimizing three primary factors: 1. Transportation costs (the most critical factor, evaluated using material index and weight-loss/gain). 2. Labor costs (firms may relocate to areas with cheap labor if savings exceed extra transport). 3. Agglomeration economies (clustering with other firms for shared infrastructure and skilled labor).

What is the Galactic City (Peripheral) Model developed by Chauncy Harris?

An expansion of the Multiple Nuclei Model reflecting automobile dependence and beltways. A central, post-industrial CBD is surrounded by suburban residential and service areas, tied together by a circumferential highway (ring road) dotted with specialized nodes like Edge Cities, office parks, and shopping malls.

What characterizes Ernest Burgess's Concentric Zone Model (1925)?

Based on Chicago, Burgess depicted urban growth as a series of concentric rings expanding outward from the center: 1. Central Business District (CBD) 2. Zone of Transition (manufacturing, deteriorating housing, immigrant enclaves) 3. Zone of Independent Workers' Homes (low-income working-class) 4. Zone of Better Residences (middle-class single-family homes) 5. Commuter Zone (high-income suburban fringe).

What is the Friction of Distance and how does Distance Decay relate to it?

• Friction of Distance: The concept that distance requires physical effort, energy, time, and money to overcome. • Distance Decay: The diminishing intensity of interaction, trade, or cultural influence between two phenomena or places as the geographic distance between them increases.

What are the three CBDs in Harm de Blij's Sub-Saharan African City Model?

1. Colonial CBD: Gridiron layout, administrative centers, multi-story European buildings. 2. Traditional CBD: Established local commerce, open-air and curbed shops, informal street vendors. 3. Periodic Market Zone: Ephemeral, vibrant outdoor marketplace operating on recurring weekly or periodic schedules.

In Weber's Least Cost Theory, distinguish between 'Bulk-Gaining' and 'Bulk-Reducing' industries.

• Bulk-Gaining (Weight-Gaining): The finished product is heavier, bulkier, or more fragile than raw inputs (e.g., beverage bottling, automobile assembly); factories locate close to the market to minimize transport costs. • Bulk-Reducing (Weight-Losing): The finished product is lighter or smaller than bulky raw materials (e.g., copper smelting, paper mills); factories locate near raw material sources.

What was Carl Sauer's concept of the 'Cultural Landscape' (Morphology of Landscape, 1925)?

Sauer posited that the cultural landscape is created when a cultural group modifies the natural environment over time ('culture is the agent, the natural area is the medium, the cultural landscape is the result'). He rejected environmental determinism in favor of possibilism.

What is T.G. McGee's Southeast Asian City Model (1967)?

A model highlighting port-centric urban growth with no distinct central CBD. Instead, economic focal points surround the historic port zone: a Western commercial zone, an alien commercial zone (dominated by Chinese merchants), mixed land-use sectors, and government zones radiating outward into squatter settlements and suburban estates.

What is Abdel Omran's Epidemiological Transition Model (1971)?

A framework mapping distinct health and mortality causes across development stages: • Stage 1: Pestilence and Famine (infectious diseases, black plague, high mortality). • Stage 2: Receding Pandemics (sanitation, nutrition, penicillin, cholera control). • Stage 3: Degenerative & Man-Made Diseases (heart disease, cancer, chronic aging conditions). • Stage 4: Delayed Degenerative Diseases (medical breakthroughs extend life with chronic illness). • Stage 5: Reemergence of Infectious Diseases (antibiotic resistance, globalization, poverty).

AP Human Geography: Major Geographic Models & Theorists

Comprehensive mastery of foundational geographic models, spatial theories, and seminal theorists including Von Thünen, Burgess, Hoyt, Harris-Ullman, Rostow, Wallerstein, Christaller, Malthus, Boserup, and Weber.

Level: basic
Languages: en → en
Cards: 32
Markdown: AP Human Geography: Major Geographic Models & Theorists (.md)

Flashcards (32)

#	Front (Term / Question)	Back (Definition / Answer)
1	What is a Primate City, and what are the economic pros and cons of primacy?	A primate city has more than twice the population of the second-largest city and exerts overwhelming national economic, political, and cultural dominance (e.g., Paris, London, Mexico City, Bangkok). • Pros: Agglomeration economies, global business hub, concentrated infrastructure. • Cons: Uneven regional development, brain drain from provinces, severe urban congestion and pollution.
2	What is John Borchert's Model of Urban Evolution (Transportation Epochs)?	Borchert categorized American urban growth into five epochs shaped by transport innovations: 1. Sail-Wagon Epoch (1790–1830): Coastal ports, waterways, horse carts. 2. Iron-Horse Epoch (1830–1870): Steam engine, regional rail networks. 3. Steel-Rail Epoch (1870–1920): Transcontinental national rail grid, heavy industry. 4. Auto-Air-Amenity Epoch (1920–1970): Internal combustion engine, highways, airports, suburbanization. 5. High-Technology Epoch (1970–present): Telecommunications, digital service economy, global logistics.
3	What is Wilbur Zelinsky's Migration Transition Model?	Zelinsky linked migration patterns to the Demographic Transition Model: • Stage 1: High daily/seasonal mobility for subsistence (pastoralism). • Stage 2: Heavy international emigration and rural-to-urban internal migration. • Stage 3 & 4: High internal urban-to-suburban migration and net international immigration. • Stage 5: Nearly all intraregional and interurban circulation.
4	What is Time-Space Compression (David Harvey)?	The phenomenon whereby modern transportation (jets, high-speed rail) and telecommunications (internet, satellite) dramatically reduce the time needed to interact across space, effectively making the world feel smaller and accelerating globalization.
5	How did Nicholas Spykman's Rimland Theory (1942) counter Mackinder's Heartland Theory?	Spykman argued that the coastal perimeter of Eurasia (the 'Rimland'—Western Europe, Middle East, South and East Asia) holds naval and land access, rich population, and industrial resources. He asserted: 'Who controls the Rimland rules Eurasia; who rules Eurasia controls the destinies of the world.' This formed the basis for the US Cold War Containment policy.
6	How does the Bid-Rent Theory explain urban and agricultural land prices?	Formulated by William Alonso based on von Thünen, Bid-Rent Theory states that real estate price and demand decrease as distance from the Central Business District (CBD) increases. Retail and commercial firms bid the highest for central locations to maximize access to customers, while residential and industrial users settle further away.
7	How does Homer Hoyt's Sector Model (1939) modify Burgess's urban structure?	Hoyt argued that cities develop not in uniform rings, but in wedge-shaped sectors or corridors radiating outward along transportation routes (rail lines, highways, rivers). High-income residential sectors expand along desirable scenic routes or high ground, while industrial and low-income sectors align along transport spines.
8	What is the primary argument of Thomas Malthus's Essay on the Principle of Population (1798)?	Malthus claimed that human population grows exponentially (geometrically: 1, 2, 4, 8, 16...), whereas food production increases only arithmetically (1, 2, 3, 4, 5...). Without voluntary preventive checks (moral restraint, late marriage), positive checks (war, famine, disease) will catastrophically reduce population to sustainable subsistence levels.
9	What is the core premise of Johann Heinrich von Thünen's Agricultural Land-Use Model (1826)?	Von Thünen modeled agricultural land use in an isolated state around a central market, showing that land use is determined by the balance between land rent (bid-rent) and transportation costs. More perishable and transport-heavy goods locate closest to the market, while less perishable and extensive goods locate farther away.
10	What are the core concepts of Chauncy Harris and Edward Ullman's Multiple Nuclei Model (1945)?	Harris and Ullman proposed that a city lacks a single dominant CBD; instead, it develops around several distinct nodes or nuclei of activity (e.g., ports, business parks, universities, airports). Activities cluster due to mutual benefit (agglomeration) or incompatibility (e.g., heavy industry repelling high-income housing).
11	What is the Griffin-Ford Model of Latin American City Structure (1980)?	A model showing a traditional CBD connected to a commercial spine lined with high-end amenities and high-class residential areas, terminating at an elite mall. Surrounding the center are concentric zones of decreasing socio-economic status: the Zone of Maturity, In Situ Accretion, and an outer peripheral belt of squatter settlements (favelas/barriadas) and a periférico highway.
12	What is the difference between Site and Situation in human geography?	• Site: The absolute, physical characteristics of a location (e.g., elevation, climate, soil quality, water access, terrain). • Situation: The relative location of a place in reference to other places, features, trade routes, or geopolitical entities (e.g., Singapore's strategic position on the Strait of Malacca).
13	What are the core ideas of Halford Mackinder's Heartland Theory (1904)?	Mackinder argued that the key to global geopolitical dominance lies in controlling the 'Heartland'—the vast, resource-rich, landlocked Eurasian interior (inaccessible to naval power). His famous maxim: 'Who rules East Europe commands the Heartland; who rules the Heartland commands the World-Island; who rules the World-Island commands the world.'
14	What is Walter Christaller's Central Place Theory (1933)?	A theory explaining the spatial distribution, size, and number of human settlements based on economic functions. It represents market areas as interlocking hexagons to eliminate unserved spaces and overlaps, organizing settlements into a hierarchical urban system.
15	How does the core-periphery model apply at a national or subnational scale?	Within a single nation, economic investment, governance, and advanced services concentrate in a core region (e.g., SE England, Northeast US, São Paulo), while peripheral regions provide food, minerals, and cheap migrant labor, often suffering from underdevelopment and political neglect.
16	How does Environmental Determinism differ from Possibilism?	• Environmental Determinism: The outdated 19th-century belief that the physical environment (climate, topography) strictly dictates and controls human culture and social development. • Possibilism: The modern geographic perspective that the physical environment limits human choices, but humans possess the agency and technology to adapt and shape their environment.
17	How did Ester Boserup challenge Malthusian theory regarding agricultural production?	Boserup argued that population growth acts as a catalyst for agricultural innovation and intensification rather than famine ('necessity is the mother of invention'). As population density increases, farmers adopt more intensive cultivation techniques, shorter fallow periods, irrigation, and multi-cropping to raise yields.
18	List the concentric rings of von Thünen's Agricultural Model from the center outward.	1. Central City / Market. 2. Ring 1: Market gardening and intensive dairying (perishable, high transport cost). 3. Ring 2: Forest / Timber production (heavy, expensive to transport fuel/building material). 4. Ring 3: Extensive field crops and grains (less perishable, lighter per unit value). 5. Ring 4: Livestock ranching and grazing (animals can walk to market, requires vast cheap land).
19	What are the five stages of W.W. Rostow's Stages of Economic Growth Model (1960)?	1. Traditional Society (subsistence agriculture, rigid social structure). 2. Preconditions for Takeoff (commercial agriculture, infrastructure development, investment). 3. Takeoff (rapid growth in limited leading manufacturing sectors, urbanization). 4. Drive to Maturity (diffusion of modern technology across all industries, diversified economy). 5. Age of High Mass Consumption (shift to consumer durables, services, high disposable income).
20	What is the Rank-Size Rule for urban settlements, and what is its formula?	Proposed by George Zipf: in a given country, the population of the $n$-th largest city is inversely proportional to its rank: $P_n = \frac{P_1}{n}$, where $P_1$ is the largest city's population. For example, the 2nd largest city is half the size of the 1st, and the 4th largest is one-fourth the size (characteristic of developed federal systems like the US).
21	What does the Gravity Model predict about spatial interaction between two places?	Derived from Newton's law of gravitation: the spatial interaction ($I_{ij}$) between two cities $i$ and $j$ is directly proportional to the product of their populations ($P_i \times P_j$) and inversely proportional to the square of the distance between them ($d_{ij}^2$): $I_{ij} = \frac{P_i P_j}{d_{ij}^2}$.
22	In Christaller's Central Place Theory, distinguish between 'Range' and 'Threshold'.	• Range: The maximum distance people are willing to travel to purchase a good or service (small for low-order goods like milk; large for high-order goods like specialized surgery or luxury cars). • Threshold: The minimum market population required to support a business or central place function profitably.
23	How does Immanuel Wallerstein's World Systems Theory divide the global capitalist economy?	Wallerstein divides countries into a dynamic three-tier hierarchy based on labor exploitation and capital accumulation: • Core: High income, advanced technology, capital-intensive production, exploits periphery (e.g., US, Germany, Japan). • Semi-Periphery: Intermediate industrializing nations that exploit the periphery while being exploited by the core (e.g., Brazil, China, India). • Periphery: Low income, low skill, raw material exporters, dependent on core capital (e.g., Chad, Bangladesh).
24	What is Alfred Weber's Least Cost Theory (1909) of industrial location?	Weber proposed that secondary manufacturing industries minimize total operational costs by optimizing three primary factors: 1. Transportation costs (the most critical factor, evaluated using material index and weight-loss/gain). 2. Labor costs (firms may relocate to areas with cheap labor if savings exceed extra transport). 3. Agglomeration economies (clustering with other firms for shared infrastructure and skilled labor).
25	What is the Galactic City (Peripheral) Model developed by Chauncy Harris?	An expansion of the Multiple Nuclei Model reflecting automobile dependence and beltways. A central, post-industrial CBD is surrounded by suburban residential and service areas, tied together by a circumferential highway (ring road) dotted with specialized nodes like Edge Cities, office parks, and shopping malls.
26	What characterizes Ernest Burgess's Concentric Zone Model (1925)?	Based on Chicago, Burgess depicted urban growth as a series of concentric rings expanding outward from the center: 1. Central Business District (CBD) 2. Zone of Transition (manufacturing, deteriorating housing, immigrant enclaves) 3. Zone of Independent Workers' Homes (low-income working-class) 4. Zone of Better Residences (middle-class single-family homes) 5. Commuter Zone (high-income suburban fringe).
27	What is the Friction of Distance and how does Distance Decay relate to it?	• Friction of Distance: The concept that distance requires physical effort, energy, time, and money to overcome. • Distance Decay: The diminishing intensity of interaction, trade, or cultural influence between two phenomena or places as the geographic distance between them increases.
28	What are the three CBDs in Harm de Blij's Sub-Saharan African City Model?	1. Colonial CBD: Gridiron layout, administrative centers, multi-story European buildings. 2. Traditional CBD: Established local commerce, open-air and curbed shops, informal street vendors. 3. Periodic Market Zone: Ephemeral, vibrant outdoor marketplace operating on recurring weekly or periodic schedules.
29	In Weber's Least Cost Theory, distinguish between 'Bulk-Gaining' and 'Bulk-Reducing' industries.	• Bulk-Gaining (Weight-Gaining): The finished product is heavier, bulkier, or more fragile than raw inputs (e.g., beverage bottling, automobile assembly); factories locate close to the market to minimize transport costs. • Bulk-Reducing (Weight-Losing): The finished product is lighter or smaller than bulky raw materials (e.g., copper smelting, paper mills); factories locate near raw material sources.
30	What was Carl Sauer's concept of the 'Cultural Landscape' (Morphology of Landscape, 1925)?	Sauer posited that the cultural landscape is created when a cultural group modifies the natural environment over time ('culture is the agent, the natural area is the medium, the cultural landscape is the result'). He rejected environmental determinism in favor of possibilism.
31	What is T.G. McGee's Southeast Asian City Model (1967)?	A model highlighting port-centric urban growth with no distinct central CBD. Instead, economic focal points surround the historic port zone: a Western commercial zone, an alien commercial zone (dominated by Chinese merchants), mixed land-use sectors, and government zones radiating outward into squatter settlements and suburban estates.
32	What is Abdel Omran's Epidemiological Transition Model (1971)?	A framework mapping distinct health and mortality causes across development stages: • Stage 1: Pestilence and Famine (infectious diseases, black plague, high mortality). • Stage 2: Receding Pandemics (sanitation, nutrition, penicillin, cholera control). • Stage 3: Degenerative & Man-Made Diseases (heart disease, cancer, chronic aging conditions). • Stage 4: Delayed Degenerative Diseases (medical breakthroughs extend life with chronic illness). • Stage 5: Reemergence of Infectious Diseases (antibiotic resistance, globalization, poverty).