APHG all terms

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Human geography
a branch of geography that focuses on the study of patterns and processes that shape human interaction with the built environment, with particular reference to the causes and consequences of the spatial distribution of human activity on the Earth's surface
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Physical geography
the study of physical features of the earth's surface
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Absolute location
The exact position of a place on the earth's surface.
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Relative location
the location of something in relation to something else
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Spatial perspective
they way geographers look at everything-- in relation to space
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Map
a 2D model of the earth or a portion of its surface
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Mental map
A map which represents the perceptions and knowledge a person has of an area
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Distribution
the frequency or occurrence of something
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Pattern
a consistent or characteristic arrangement
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Formal region
a region marked by uniformity
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Functional (nodal) region
a group of places linked together by some function's influence on them
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Perceptual (vernacular) region
a region defined by people's beliefs
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Remote sensing
technique of obtaining information about objects through the study of data collected by special instruments that are not in physical contact with the objects being analyzed
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Geographic Information Systems
a computer program that stores geographic data and produces maps to show those data
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Diffusion
the spread of a culture element or some other phenomena
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Expansion diffusion
a form of diffusion in which the cultural component spreads outward to new places while remaining strong in its original hearth
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Relocation diffusion
a form of diffusion that involves the actual movement of the original adopters from their point of origin to a new place
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Acculturation
occurs when the "weaker" of two cultures adopts traits from the more dominant culture
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Assimilation
in cultural convergence, this occurs when the original traits of the weaker culuter are completely erased and replaced by the traits of the more dominant culture
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Transculturation
occurs when two cultures of just about equal power or influence meet and exchange ideas or traits without the domination seen in acculturation and assimilation
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Contagious diffusion
a form of expansion diffusion in which numerous places or people near the point of origin become adopters
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Hierarchical diffusion
occurs when the diffusion innovation or concept spreads from a place or person of power or high susceptibility to another ina leveled pattern
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Independent invention
in which many hearths invent similar innovations without knowing about each other
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Environmental determinism
the idea that human behavior is controlled by the physical environment
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Possibilism
the idea that the natural environment places limits on the set of choices available to people
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Culture
the sum total of the knowledge, attitudes, and habitual behavior patterns shared and transmitted by the members of society
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Cultural diffusion
the spread of culture
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Cultural landscape
tangible result of a human group's interaction with its environment
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Culture hearth
area where innovations in culture began and from which such cultural elements spread
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Culture trait
a single piece of a culture's traditions and practices
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Culture complex
a unique combination of culture traits for a particular culture group
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Culture realm
A cluster of regions in which related culture systems prevail.
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Culture region
A region within which common culture charecteristics prevail
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Culture system
collection of culture complexes that shaper a group's common identity
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Sequent occupance
theory that a place is occupied by different groups of people, each group leaving an imprint on the place from which the next group learns
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Folk culture
isolated group that has had long-lasting culture traits that have not changed substantially over time
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Popular culture
mass culture that diffuses rapidly
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Commodification
the process though which something is given monetary value
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Stimulus diffusion
expansion diffusion in which the innovative idea diffuses from its hearth outward, but the original idea is changed by the new adopters
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adaptive strategies
the unique way in which each culture uses its particular physical environment
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architectural form
the look of housing, effected by the available materials, the environment the house is in, and the popular culture of the time
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authenticity
the truthfulness of origins, attributions, commitments, sincerity, devotion, and intentions; the quality of being authentic
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cultural appropriation
the process by which cultures adopt customs and knowledge from other cultures and use them for their own benefit
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folk culture
cultural traits such as dress modes, dwellings, traditions, and institutions of usually small, traditional communities
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folk ways
any informal norms, virtues, or values characterized by being followed through imitation and mild social pressure but not strictly enforced or put into law
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folklore
consists of legends, music, oral history, proverbs, jokes, popular beliefs, and customs that are the traditions of that culture, subculture, or group
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maladapted diffusion
diffusion in which image takes precedence over practicality
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material culture
the art, housing, clothing, sports, dances, foods, and other similar items constructed or created by a group of people
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non material culture
the beliefs, practices, aesthetics, and values , of a group of people
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placelessness
the loss of uniqueness of place in the cultural landscape so that one place looks like the next
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popular culture
cultural traits such as dress, diet, and music that identify and are part of today's changeable, urban-based, media-influenced, western societies
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survey systems
systems that are used to collect data
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traditional architecture
traditional building styles of different cultures, religions, and places
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vernacular
the commonly spoken language or dialect of a particular people or place
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acculturation
the exchange of cultural features that results when groups come into continuous first-hand contact
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adaptation
adjusting to a translation based on the cultural environment of the target language
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assimilation
the process through which people lose originally differentiating traits, such as dress, speech, particularities, or mannerisms when they come into contact with another society or culture
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cultural convergence
contact and interaction of one culture and another
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cultural divergence
the separation of cultures through less and less contact and interaction between them; restriction of a culture from outside influences
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cultural integration
the process of combining cultures together into one
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core / periphery / semi-periphery
the core-periphery idea that the core houses the main economic power of the region and the outlying region and that the periphery houses the lesser economic ties with the semi-periphery in-between the two
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cultural identity
the way people categorize their culture, sometimes by the way they dress and what they eat
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cultural realm
the entire region that displays the characteristics of a culture
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cultural regions
a portion of earth's surface occupied by a population sharing recognizable and distinctive cultural characteristics
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global-local continuum
the notion that what happens at the global scale has a direct effect on what happens at the local scale, and vice-versa
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glocalization
the process by which people in a local place mediate and alter regional, national, and global processes
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innovation adoption
the diffusion of new ideas
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bario / favala
a shantytown in or near a city; slum area
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cultural adaptation
adjusting to a translation based on the cultural environment of the target language
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cultural shatter belt
an area of instability between regions with opposing political and cultural values
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ethnic cleansing
the systematic killing or extermination of an entire people or nation
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ethnic conflict
a struggle that happened because of ethnicities interacting
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ethnic conclave
a gathering of an ethnic group
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ethnic group
people of the same race or nationality who share a distinctive culture
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ethnic homeland
a sizable area inhabited by an ethnic majority that exhibits a strong sense of attachment to the region
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ethnic neighborhood
a neighborhood, typically situated in a larger metropolitan city and constructed by or comprised of a local culture, in which a local culture can practice its customs
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ethnicity
affiliation or identity within a group of people bound by common ancestry and culture
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ethnocentrism
conviction of the evident superiority of one's own ethnic group
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ghetto
a forced or voluntarily segregated residential area housing a racial, ethnic, or religious minority
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plural society
a society that contains various cultural groups
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race
a categorization of humans based on skin color and other physical characteristics
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segregation
a measure of the degree to which members of a minority group are non-uniformly distributed among the total population
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creole
a language that began as a pidgin language but was later adopted as the mother tongue by a people in a place of the mother tongue
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dialect
local or regional characteristics of a language
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indo-european language
a family of several hundred related languages and dialects
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isogloss
a geographic boundary within which a particular linguistic feature occurs
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language family
group of languages with a shared but fairly distant origin
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language group
set of languages with a relatively recent common origin and many similar characteristics
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lingua franca
a language used among speakers of different languages for the purposes of trade and commerce
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linguistic diversity
the amount of variation of languages a place has
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monolingual
only one language spoken
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multilingual
more than one language spoken
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official language
in multilingual countries the language selected to promote internal cohesion; usually the language of the courts and government
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pidgin
when two or more languages are combined in a simplified structure and vocabulary
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proto language
an assumed, reconstructed, or recorded ancestral language
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toponymy
the study of place names of a region, or toponyms
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dowry death
in the context of arranged marriages in India, disputes over the price to be paid by the family of the bride to the father of the groom (the dowry) have, in some cases, lead to the death of the bride
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enfranchisement
to admit to citizenship; the rite of voting
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gender
social differences between men and women, rather than the anatomical, biological differences between the sexes
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gender gap
a measurable difference between the behaviors of men and women
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infanticide
the murder of infants
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longevity gap
the difference of average expected life spans between different groups of people, nations, races, etc.
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maternal mortality rate
annual number of deaths of women from pregnancy-related causes per 100,000 live births
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animism
the belief that inanimate objects, such as trees, rocks, and rivers, posses souls
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buddhism
religion; belief that enlightenment will come through knowledge, especially self knowledge, elimination of greed, craving, and desire, complete honesty, and never hurting another person or animal
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christianity
religion based on the life and teachings of Jesus
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confucianism
a philosophy of ethnics, education, and public service based on the writings of Confucius
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ethnic religion
a religion that is particular to one culturally distinct group of people
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exclave
a territory legally or politically attached to another territory with which is not physically contiguous
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enclave
a territory whose geographical boundaries lie entirely within the boundaries of another territory
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fundamentalism
the interpretation of every word in the sacred text as literal truth
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geomancy (feng shui)
the Chinese art and science of the placement and orientation of tombs, dwellings, buildings, and cities
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hajj
the Muslim pilgrimage to Mecca, the birthplace of Muhammad
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hinduism
religion; unique in that it does not have a single founder, a single theology, or agreement on its origins
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interfaith boundaries
boundaries between the world's major faiths
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islam
religion; based on the teachings of Muhammad
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juinism
an Indian religion that prescribes a path of non-violence towards all living things
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judaism
religion; roots in the teachings of Abraham, who is credited with uniting his people to worship only one god
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landscapes of the dead
landscapes such as cemeteries that are only there because of the dead
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monotheism
the belief in a single god
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polytheism
belief in multiple gods
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mormonism
comprises the religious, institutional, and cultural elements of the most populace branch of the Latte Day Saint movement
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muslim pilgrimage
hajj
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proselytic religion
a universalizing religion, which is an attempt to be global, to appeal to all people, wherever they may live in the world, not just those of one culture or location
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reincarnation
the idea that after this life you will come back in another life either as a plant, animal, or a human
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religious fundamentalism
religious movement whose objectives are to return to the foundations of the faith and to influence state policy
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religious extremism
religious fundamentalism carried to the point of violence
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religious toponyms
the origin and meaning of the names of religions
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sacred space
place or space people infuse with religious meaning
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shamanism
community faith in traditional societies in which people follow their shaman
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secularism
the idea that ethical and moral standards should be formulated and adhered to for life on earth not to accommodate the prescriptions of a deity and promises of a comfortable afterlife
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sharia law
the system of Islamic law, based on varying degrees of interpretation of the Qu'ran
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shintoism
religion; located in japan and related to Buddhism; focuses particularly on nature and ancestor worship
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sikhism
religion; began in northern Inda; the principal belief is that faith in Vahiguru emphasizes faith in god
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sunni
branch of Islam; orthodox/traditionalist; believe in the effectiveness of family and community in the solution of life's problems; accept traditions of Muhammad as authoritative
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shia (shi'ite)
branch of Islam; Persian variation; believe in the infallibility and divine right to authority of the Imams, descendants of Ali
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syncretism
the development of a new form of culture trait by the fusion of two or more distinct parental elements
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taoism
religion; based upon Tao-te-ching, a book by Lao-Tsu which focuses on the proper form of political rule and on the oneness of humanity and nature
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theocracy
a state whose government is under the control of a ruler who is deemed to be divinely guided, or of a group of religious leaders
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universalizing
belief system that espouses the idea that there is one true religion that is universal in scope
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zoroastranism
religion; based on the teachings of the prophet Zoroaster; founded in the eartly part of the 5th century BCE
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Pandemic
a disease that occurs over a wide geographic area and affects a very high proportion of the population
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Physiological density
The number of people per unit of area of arable land, which is land suitable for agriculture.
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Population pyramid
shows percentage of population in 5-year age groups, with the youngest group at the base of the pyramid and the oldest group at the top. The length of the bar represents the percentage of the total population in that group. Males are usually on the left and females on the right
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Sex ratio
The number of males per 100 females in the population.
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Total fertility rate (TFR)
The average number of children a woman will have throughout her childbearing years.
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Medical Revolution
Medical technology invented in Europe and North America that is diffused to the poorer countries of Latin America, Asia, and Africa. Improved medical practices have eliminated many of the traditional causes of death in poorer countries and enabled more people to live longer and healthier lives.
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Natural Increase Rate
The percentage growth of a population in a year, computed as the crude birth rate minus the crude death rate.
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Overpopulation
The number of a people in an area exceeds the capacity of the environment to support life at a decent standard of living.
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Agricultural Density
The ratio of the number of farmers to the total amount of land suitable for agriculture
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Agricultural Revolution
The time when human beings first domesticated plants and animals and no longer relied entirely on hunting and gathering
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Arithmetic Density
The total number of people divided by the total land area.
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Census
an official count or survey of a population, typically recording various details of individuals
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Crude Birth Rate
the total number of live births yearly per thousand people in a population
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Crude Death Rate
The total number of deaths yearly per 1,000 people in the population
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Demography
the scientific study of population characteristics
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Demographic Transition Model
A sequence of demographic changes in which a country moves from high birth and death rates to low birth and death rates through time.
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Demographic Momentum
this is the tendency for growing population to continue growing after a fertility decline because of their young age distribution. This is important because once this happens a country moves to a different stage in the demographic transition model.
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Baby Boom
A sudden increase in the birth rate of a population
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Age Distribution
a model used in population geography that describes the ages and number of males and females within a given population; also called a population pyramid
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Total Fertility Rate
The number of children born to an average woman in a population during her entire reproductive life
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Dependency Ratio
The number of people under the age of 15 and over age 64 (non-working), compared to the number of people active in the labor force.
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Doubling Time
the time required for a population to double in size assuming constant rate
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Epidemiological Transition Model
The theory that says that there is a distinct cause of death in each stage of the demographic transition model. It can help explain how a country's population changes so dramatically.
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Epidemiology
Branch of medical science concerned with the incidence, distribution, and control of diseases that affect large numbers of people.
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Ecumene
The portion of Earth's surface occupied by permanent human settlement.
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Underpopulation
circumstances of too few people to sufficiently develop the resources of a country or region to improve the level of living of its inhabitants.
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J-Curve
This is when the projection population shows exponential growth; sometimes shape as a j-curve. This is important because if the population grows exponential our resource use will go up exponential and so will our use as well as a greater demand for food and services.
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Population Distribution
Variation of population density over a particular geographic area. For example, a country has a high population density in its urban areas and a much lower population density in rural areas.
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Demographic Regions
Regions grouped together by the stage of the demographic transition model that most countries in the region are in. Cape Verde (Africa) is in Stage 2 (High Growth), Chile (Latin America) is in Stage 3 (Moderate Growth), and Denmark (Europe) is in Stage 4 (Low Growth). This is important because it shows how different parts of the world are in different stages of the demographic transition
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Cohort
A population group unified by a specific common characteristic, such as age, and subsequently treated as a statistical unit.
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Natality
the ratio of live births in an area to the population of that area
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Crude Density
the number of people per unit area of land
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Population Explosion
the rapid growth of the world's human population during the past century
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S-Curve
a curve that depicts logistic growth; shape of an "S." The leveling off of a J-Curve exponential growth.
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Brain Drain
Large-scale emigration by talented people.
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Disease Diffusion
There are two types, contagious and hierarchical. Hierarchical is along high density areas that spread from urban to rural areas. Contagious is spread through the density of people. This is important in determining how the disease spread so you can predict how it will spread.
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Life Expectancy
The average number of years an individual can be expected to live, given current social, economic, and medical conditions. Life expectancy at birth is the average number of years a newborn infant can expect to live.
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Geodemographic analysis
practice of assessing the location and composition of particular populations.
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Standard of Living
a level of material comfort in terms of goods and services available to someone
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Maladaptation
This is an adaptation that has become less helpful than harmful. This relates to human geography because it has become less and less suitable and more of a problem or hindrance in its own right, as time goes on. Which shows as the world changes so do the things surrounding it
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Distance Decay
the effects of distance on interaction, generally the greater the distance the less interaction
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Zero Population Growth
when the birth rate equals the death rate
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Demographic Equation
The formula that calculates population change. The formula finds the increase (or decrease) in a population. The formula is found by doing births minus deaths plus (or minus) net migration. This is important because it helps to determine which stage in the demographic transition model a country is in.
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Sustainability
the ability to meet humanities current needs without compromising the ability of future generations to meet their needs; the 3 components of sustainability are economy, environment, and society (culture)
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Infant Mortality Rate
a figure that describes the number of babies that die within the first year of their lives in a given population
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Gravity model
A model that holds that the potential use of a service at a particular location is directly related to the number of people in a location and inversely related to the distance people must travel to reach the service.
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Intervening Opportunity
the presence of a nearer opportunity that greatly diminishes the attractiveness of sites farther away
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Push-Pull Factors
Conditions that draw people to another location (pull factors) or cause people to leave their homelands and migrate to another region (push factors)
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Carrying Capacity
largest number of individuals of a population that a environment can support
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Mortality
the ratio of deaths in an area to the population of that area
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Transhumance
The seasonal migration of livestock between mountains and lowland pastures.
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Population Densities
Number of people living in an area per a unit of measurement.
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Natural Decrease Rate
The result of death rates being higher than birth rates
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Personal Space
how people distance themselves from one another
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Transmigration
the government-required relocation of people away from overpopulated core regions to less crowded areas. (Indonesia has a policy of moving people away from Java.)
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Population Policy
an official government strategy designed to affect any or all of several objectives including the size, composition, and distribution of population
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Voluntary Migration
movement in which people relocate in response to perceived opportunity; not forced.
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Forced Migration
Human migration flows in which the movers have no choice but to relocate.
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Refugees
People who are forced to migrate from their home country and cannot return for fear of persecution because of their race, religion, nationality, membership in a social group, or political opinion.
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Chain Migration
migration of people to a specific location because relatives or members of the same nationality previously migrated there
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Internal Migration
Migration within a country
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Migration patterns
patterns of movement; Intercontinental- over countries' borders, Interregional- within a region or certain area, Rural-Urban- from a rural area to an urban area (farm to a city)
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Guest Workers
Workers who migrate to the more developed countries of Northern and Western Europe, usually from Southern of Eastern Europe or from North Africa, in search of higher-paying jobs.
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Undocumented Immigrants
immigrants who come into a country without the government's permission
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Immigration
moving into a population
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Emigration
Leaving a population
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Thomas Malthus
an English economist who argued that increases in population would outgrow increases in the means of subsistence (food) (1766-1834)
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Neo-Malthusian
A belief that the world is characterized by scarcity and competition in which too many people fight for too few resources. Named for Thomas Malthus, who predicted a dismal cycle of misery, vice, and starvation as a result of human overpopulation
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multinational corporation (MNC)
A large business organization operating in a number of different national economies; the term implies a more extensive form of transnational corporation.
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NAFTA
A trade agreement between Canada, the United States and Mexico that encourages free trade between these North American countries.
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outsourcing: 1
Producing abroad parts or products for domestic use or sale
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outsourcing: 2
Subcontracting production or services rather than performing those activities "in house."
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primary activities
Those parts of the economy involved in making natural resources available for use or further processing; included are mining, agriculture, forestry, fishing and hunting, and grazing.
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profit maximization
A method of setting prices that occurs when marginal revenue equals marginal cost.
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quaternary activities
Those parts of the economy concerned with research, with the gathering and dissemination of information, and with administration - including administration of the other economic activity levels; often considered only as a specialized subdivision of tertiary activities.
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quinary activities
A sometimes separately recognized subsection of tertiary activity management functions involving highest-level decision making in all types of large organizations. Also deemed the most advanced form of the quaternary subsector.
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satisficing location
A less-than-ideal best location, but one providing an acceptable level of utility or satisfaction.
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secondary activities
Those parts of the economy involved in the processing of raw materials derived from primary activities and in altering or combining materials to produce commodities of enhanced utility and value; included are manufacturing, construction, and power generation.
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short-haul penalty
When using a shorter haul distance is more expensive that one long haul distance.
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spatial margin of profitability
The set of points delimiting the area within which a firm's profitable operation is possible.
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spatially fixed cost
An input cost in manufacturing that remains constant wherever production is located.
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spatially variable cost
An input cost in manufacturing that changes significantly from place to place in its amount and its relative share of total costs.
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substitution principle
In industry, the tendency to substitute one factor of production for another in order to achieve optimum plant location.
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supply curve
A curve that shows the relationship between the price of a product and the quantity of the product supplied.
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terminal costs
(syn: fixed costs of transportation) The costs incurred, and charged, for loading and unloading freight at origin and destination points and for the paperwork involved; costs charged each shipment for terminal facility use and unrelated to distance of movement of line-haul costs.
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tertiary activities
Those parts of the economy that fulfill the exchange function, that provide market availability of commodities, and that bring together consumers and providers of services; included are wholesale and retail trade, associated transportational and governmental services, and personal and professional services of all kinds.
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transfer of technology
The process of skill transferring, knowledge, technologies, methods of manufacturing.
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transnational corporation (TNC)
A large business organization operating in at least two separate national economies; a form of multinational corporation.
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ubiquitous industry
A market-oriented industry whose establishments are distributed in direct proportion to the distribution of population.
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uniform (isotropic) plain
A hypothetical portion of the earth's surface assumed to be an unbounded, uniformly flat plain with uniform and unvarying distribution of population, purchasing power, transport costs, accessibility, and the like.
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variable costs of transportation
[syn: line-haul costs (syn: over-the-road costs) The costs involved in the actual physical movement of goods (or passengers); costs of haulage (including equipment and routeway costs), excluding terminal costs.
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vertical integration
Practice where a single entity controls the entire process of a product, from the raw materials to distribution.
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weight gaining
When a product undergoes the gain of net weight by combining several things together to create a larger product.
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weight reduction
When a product undergoes the loss of net weight by removal of the original materials.
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agglomeration
The spatial grouping of people or activities for mutual benefit; in economic geography, the concentration of productive enterprises for collective of cooperative use of infrastructure and sharing of labor resources and market access.
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agglomeration economies
(syn. external economies) The savings to an individual enterprise derived for locational association with a cluster of other similar economic activities, such as other factories or retail stores.
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break-of-bulk point
A location where goods are transferred from one type of carrier to another (e.g., from barge to railroad).
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comparative advantage
The principle that an area produces the items for which it has the greatest ratio of advantage or the least ratio of disadvantage of advantage in comparison to other areas, assuming free trade exists.
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conglomerate corporations
Companies that have diversified into various economic activities usually through a process of mergers and acquisitions.
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deglomeration
The process of deconcentration; the location of industrial or other activities away from established agglomerations in response to growing costs of congestion, competition, and regulation.
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deindustrialization
The cumulative and sustained decline in the contribution of manufacturing to a national economy.
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demand curve
A graph of the relationship between the price of a good and the quantity demanded.
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economies of scale
Factors that cause a producer's average cost per unit to fall as output rises.
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fixed cost
An activity cost (as of investment in land, plant, and equipment) that must be met without regard to level of output; an input cost that is spatially constant.
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footloose
A descriptive term applied to manufacturing activities for which the cost of transporting material or product in not important in determining location of production; an industry or firm showing neither market nor material orientation.
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Fordism
The manufacturing economy and system derived from assembly-line mass consumption of standardized goods. Named after Henry Ford, who innovated many of its production techniques.
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freight rates
The charge levied by a transporter for the loading, moving, and unloading of goods; includes line-haul costs and terminal costs.
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friction of distance
A measure of the retarding or restraining effect of distance on spatial interaction. Generally, the greater the distance, the greater the cost of achieving the exchange.
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high-tech industry
The use of advanced scientific ideas and special skills and tools to meet people's needs.
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inelastic demand
A situation in which an increase or a decrease in price will not significantly affect demand for the product
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Industrial Revolution
The term applied to the rapid economic and social changes in agriculture and manufacturing that followed the introduction of the factory system to the textile industry of England in the last quarter of the 18th century.
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isotropic plain
A hypothetical portion of the earths surface assumed to be an unbounded, uniformly flat plain with uniform and unvarying distribution of population, purchasing power, transport costs, accessibility, and the like.
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just-in-time production
Process that redefines and simplifies manufacturing by reducing inventory levels and delivering raw materials just when they are needed on the production line
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labor intensive
Type of industry in which labor cost is a high percentage of expense.
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least-cost theory (Weber)
(syn. Weberian analysis) The view that the optimum location of a manufacturing establishment is at the place where the costs of transport and labor and the advantages of agglomeration or deglomeration are most favorable.
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line-haul costs
(syn. over-the-road costs) The costs involved in the actual physical movement of goods (or passengers); costs of haulage (including equipment and routeway costs), excluding terminal costs.
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location theory
A logical attempt to explain the locational pattern of an economic activity and the manner in which its producing areas are interrelated.
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locational interdependence (Hotelling)
The circumstance under which the locational decision of a particular firm is influenced by the locations chosen by competitors.
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locational triangle
A simple graphic model in Weberian analysis to illustrate the derivation of the least-transport-cost location of an industrial establishment.
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market equilibrium
The point of intersection of demand and supply curves of a given commodity; at equilibrium the market is cleared of the commodity.
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market orientation
The tendency of an economic activity to locate close to its market; a reflection of large and variable distribution costs.
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Maquiladora
Factories built by US companies in Mexico near the US border to take advantage of much lower labor costs in Mexico.
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material orientation
The tendency of an economic activity to locate near or at its source of raw material; this is experienced when material costs are highly variable spatially and/or represent a significant share of total costs.
265
multiplier effect
The direct, indirect, and induced consequences of change in an activity.
266
multiplier effect: industrial agglomerations
In industrial agglomerations, the cumulative processes by which a given change (such as a new plant opening) sets in motion a sequence of further industrial employment and industrial growth.
267
multiplier effect: urban geography
In urban geography, the expected addition of nonbasic workers and dependents to a city's total employment and population that accompanies new basic sector employment.
268
acid rain
precipitation that is unusually acidic; created when oxides of sulfur and nitrogen change chemically as they dissolve in water vapor in the atmosphere and return to earth as acidic rain, snow, or fog
269
aquifer
a porous, water-bearing layer of rock, sand, or gravel below ground level
270
biome
a major ecological community, including plants and animals, occupying an extensive earth area
271
biosphere
(syn ecosphere) the thin film of air, water, and earth within which we love, including the atmosphere, surrounding and subsurface waters, and the upper reaches of the earth's crust
272
desertification
extension of desertlike landscapes as a result of overgrazing, destruction of the forests, or other human-induced changes, usually in semiarid regions
273
ecosystem
a population of organisms existing together in a small, relatively homogeneous area (pond, forest, small island) together with the energy, air, water, soil, and chemicals upon which it depends
274
environment
surroundings; the totality of things that in any way may affect an organism, including both physical and cultural conditions; a region characterized by a certain set of physical conditions
275
environmental pollution
the introduction into the biosphere of materials that because of their quantity, chemical nature, or temperature have a negative impact on the ecosystem or that cannot be readily disposed of by natural recycling processes
276
fallowing
the practice of allowing plowed or cultivated land to remain uncropped or only partially cropped for one or more growing seasons
277
greenhouse effect
heating of the earth's surface as shortwave solar energy passes through the atmosphere, which is transparent to it but opaque to reradiated long-wave terrestrial energy; also, increasing the opacity of the atmosphere through the addition of increased amounts of carbon dioxide and other gases that trap heat
278
hazardous waste
discarded solid, liquid, or gaseous material that poses a substantial threat to human health or to the environment when improperly disposed of or stored
279
hydrologic cycle
the natural system by which water is continuously circulated through the biosphere by evaporation, condensation, and precipitation
280
icebox effect
the tendency for certain kinds of air pollutants to lower temperatures on earth by reflecting incoming sunlight back into space and thus preventing it from reaching (and heating) the earth
281
limiting factor principle
the distribution of an organism or the structure of an ecosystem can be explained by the control exerted by the single factor (such as temperature, light, water) that is most deficient, that is, that falls below the levels required
282
ozone
a gas molecule consisting of three atoms of oxygen formed when diatomic oxygen is exposed to UV radiation. In the upper atmosphere it forms a normally continuous, thin layer that blocks UV light; in the lower atmosphere it constitutes a damaging component of photochemical smog
283
crop rotation
the annual alteration of crops that make differential demands on or contributions to soil fertility
284
soil
the complex mixture of loose material including minerals, organic and inorganic compounds, living organisms, air, and water found at teh earth's surface and capable of supporting plant life
285
soil erosion
the wearing away and removal of rock and soil particles from exposed surfaces by agents such as moving water, wind, or ice
286
terracing
the practice of planting crops on steep slopes that have been converted into a series of horizontal steplike level plots
287
toxic waste
discarded chemical substances that can cause serous illness or death
288
antecedent boundary
a boundary line established before the area in question is well populated
289
artificial boundary
(syn geometric boundary) a boundary without obvious physical geographic basis; often a section of a parallel of latitude or a meridian of longitude
290
autonomous nationalism
movement by a dissident minority intent to achieve partial or total independence of territory it occupies from the state within which it lies
291
centrifugal force
1. economic and social forces pushing households and businesses outward from central and inner-city locations OR 2. forces of disruption and dissolution threatening the unity of a state
292
centripetal force
1. a force attracting establishments or activities to the city center OR 2. forces tending to bind together the citizens of a state
293
compact state
a state whose territory is nearly circular
294
consequent boundary
(syn ethnographic boundary) a boundary line that coincides with some cultural divide, such as religion or language
295
containment
a guiding principle of US foreign policy during the Cold War period; to prevent or restrict the expansion of the Soviet Union's influence or control beyond its then existing limits
296
core area
(1) the national or world districts of concentrated economic power, wealth, innovation, and advanced technology
(2) the heartland or nucleus of a state, containing its most developed area, greatest wealth, densest populations, and clearest national identity
297
devolution
the transfer of certain powers from the state central government to separate political subdivisions within the state's territory
298
domino theory
a geopolitics theory made part of American containment (of the former Soviet Union) policy beginning in the 1950s. The theory maintained that if a single country fell under Soviet influence or control, its neighbors would likely follow, creating a ripple effect like a line of toppling dominos
299
electoral geography
the study of the geographical elements of the organization and results of elections
300
elongated state
a state whose territory is long and narrow

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