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29 Cards in this Set
- Front
- Back
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population distribution
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how population is spread over the earth
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demographers
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a scientists who studies the popoulation, birthrate, and deathrate of the earth
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population density
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average number of people that live in a given area
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birthrate
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the number of live births per 1000 people
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deathrate
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the number of deaths each year per 1000 people
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life expectancy
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the average years a person lives
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imigrants
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a person who moves to a new country in oder to settle there.
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"push-pull" theory
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a theory of migration that says people migrate because certian things in thier lives "push" them to leave and certian things in a new place "pull" them
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rural areas
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an area with low population density such as a village or countryside
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urban area
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an area with a high population density;a city or town
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urbanization
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the growth of city populations cuased by the movements of people to cities.
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raw materials
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a resource of material that is still in its natural state, before being processed or manufactured into a useful prouduct
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recyclable resorces
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a resorce that goes through natural prosesses
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renewable resorces
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a natural resorce that continues to get supply as it is used. trees are renewable resorces
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nonrenewable resorces
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a resorce that cannot pe replacesed once it is used
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manufactuing
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a process of turning raw materials into a finished product
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population
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total number of people that live a certian area
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developed nations
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a modern society with a well -delvolped economy
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deleloping nations
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a country with relatively low production often lacking modern technology
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commercial farming
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farming that is dumb by companies. they are large and use modern technology
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subsistence farming
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farming that provides enough for a family
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plantations
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a large estate, usually in a warm climate, on which crops grow
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foreign aid
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economic and millitary aid to another country
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ecosystem
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a community of living things and their evironment
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deforestation
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a process of clearing land of trees or forests ususally to make room for farms and homes
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habitats
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the area in which a plant or animal lives or grows
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acid rain
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rain whose high level of chemicals can pollute or damage the environment
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hydorsd
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asds
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Green Revolution
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scientists found a new way to grow crops with less water. this change in agriculture is call the Green Revolution.
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