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Understanding Population Dynamics: Key Concepts and Definitions

This overview provides essential definitions and concepts related to population studies, including the roles of demographers, population density, urban migration, and the distinction between developed and developing countries. It also discusses birth and death rates, annual increase, doubling time, zero and negative population growth, and population distribution. Additionally, it highlights key terms such as emigration, immigration, and the conditions of land regarding habitability and agriculture. Understanding these concepts is crucial for grasping the complexities of population dynamics.

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Understanding Population Dynamics: Key Concepts and Definitions

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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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