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30 Cards in this Set
- Front
- Back
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The study of population |
Demography |
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Population in 2050 |
9.7 billion |
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population in 2100 |
11.2 billion |
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population in 2300 |
anywhere from 2.3 to 36 billion |
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The maximum number of people Earth can support |
Earth's maximum carrying capacity |
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The population of the earth compared to the earths land area |
population density |
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Number of persons per unit of land area |
arithmetic population density |
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U.S persons per sq mile |
83 |
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number of persons per unit area of agriculturally produced land |
physiologic population density |
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90% of the worlds population is concentrated on less than 20% of the worlds land area |
global population distribution |
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Rapid increase in the food supply birth rates started to decline |
2 problems of Malthus |
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number of births per 1000 |
birth rate |
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number of deaths per 1000 |
death rates |
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BR-DR birth rate minus death rate |
rate of natural increase |
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before industrialization high birth rates poor nutrition, unsanitary water |
time 1 |
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decline in death rates early industrial days agriculture, greater food supplies less starvtion |
time 2 |
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1800: 9% 1914: 80% |
urban population in England |
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Labor Old age protection high infancy morality rates |
reasons why people have lots of kids in a rural agrarian pre-industrial society |
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1.drain on resources 2. gov't provides for old age protection 3. Decrease in infant morality rates 4. Trade off kids vs. morality rates 5. expanded educational career opportunities for womrn |
why have fewer kids in an urban industrial society |
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rate of natural increase (does not take into account inmigration and outmigration) |
world population growth |
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the number of children a women can expect to bear in her lifetime |
fertility rate |
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the fertility rate necassary to keep a societys population stable over time without immagration |
replacment rate |
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world wide rate 2.1 |
replacment rate |
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birth rate = death rates |
zero population growth |
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birth rates < death rates |
negative population growth |
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the movement of people from one geographic location to another. Involves a change in residence intended to be permanent |
migration |
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economic opportunities war and political conflict political and/or religious oppression environmental disasters quality of life factors |
why people migrate |
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variables that cause people to migrate bc the situation in their current location is unsatisfactory, inadequate, or dangerous |
push factor |
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variables that attract people from other locations bc they offer positive opportunities or amenities |
pull factors |
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migration that occurs within a single countrys borders |
internal migrations |
