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