Farming focused on feeding the farmer's family with little surplus.
What is Subsistence Agriculture?
A city with a population of more than 10 million people.
What is a Megacity?
The total value of goods and services produced within a country in a year.
What is GDP?
This model explains agricultural location based on transport costs.

The physical gap or interval between two objects.
What is Space?
This "Revolution" introduced high-yield seeds and chemical fertilizers.
What is Green Revolution?
A city more than twice as large as the next biggest city in that country.
What is Primate City?
Wallerstein’s category for highly developed, wealthy countries.
What is Core?
This model describes city growth in a series of rings outward from the CBD.

What is Concentric Zone (Burgess)?
The loss of uniqueness of place so that one place looks like the next.
What is Placelessness?
Clearing land by cutting and burning vegetation to add nutrients.
What is Slash-and-Burn?
Low-income settlements on the outskirts of LDC cities on unowned land.
What is Squatter Settlements?
This index (HDI) measures life expectancy, education, and income.
What is HDI?
The theory that divides the world into Core, Semi-Periphery, and Periphery.
What is World System's Theory?
A boundary drawn after a population has settled (e.g., based on religion).
What is Subsequent Boundary?
Large-scale farming of one crop, usually in tropical regions of LDCs.
What is plantation?
A strategy for urban growth that focuses on walkability and parks.
What is New Urbanism?
Zones (SEZs) that offer tax breaks to attract foreign investment.
What is SEZs?
This model features "edge cities" and a beltway surrounding the city.

What is Galactic?
The transition from high birth and death rates to low ones.
What is Demographic Transition?
The bid-rent theory states that land closest to the CBD has this.
What is Highest Rent/Value?
The process of middle-class people moving into and renovating inner-city housing.
What is Gentrification?
Rostow’s final stage of development where consumers buy high-value goods.
What is Age of High Mass Comsumption?
The rule that the nth largest city is 1/n the size of the largest city.
What is Rank-Size Rule?
An underlying principle spreads even though the characteristic is rejected.
What is Stimulus Diffusion?