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Population

Population. Demographers – scientists who study population Population density – the average number of people living in a square mile or kilometer Urban Migration – movement to cities. Population Definitions. Developed countries – countries that are industrialized

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Population

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  1. Population

  2. Demographers – scientists who study population • Population density – the average number of people living in a square mile or kilometer • Urban Migration – movement to cities

  3. Population Definitions • Developed countries – countries that are industrialized • Developing countries – countries that are working toward industrialization

  4. Birth and Death Rates • Birthrate – the number of people born each year per 1,000 people • Death rate - the number of deaths per year per 1,000 people

  5. Annual Increase – the # by which the population is increasing each year • Doubling Time – the # of years it will take for a population to double at its current rate of growth • At current growth rates, the population of the earth will double in 50 years

  6. Z.P.G. Zero Population Growth – population is holding steady • N.P.G. Negative Population Growth – population is decreasing • Population distribution – the way population is spread out over areas

  7. Carrying capacity – the maximum number of people an environment can support

  8. Population Definitions • Emigrate – to leave the country in which you were born • Immigrate – to arrive in a new country for permanent residence • Refugees – people who flee their country for refuge (safety) from persecution or disaster

  9. Land • Habitable – supports life – you can live on it • Uninhabitable – does not support life • Arable – will grow crops • Non-Arable – will not grow crops • Topsoil – the small layer of nutrient rich soil that supports crop growth • Soil erosion – washing away of valuable topsoil

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