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Studying Human Populations

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Presentation on theme: "Studying Human Populations"— Presentation transcript:

1 Studying Human Populations
The Human Population Studying Human Populations

2 The Human Population Over Time
Demography- The study of populations Most often human pop. Study historical size and makeup Human pop. Had slow growth until 1800s Underwent exponential growth Industrial and scientific revolutions

3 World Population Over Time

4 Forecasting Population Size
Age structure- The distribution of ages in a specific population at a certain time Population pyramid- Double-sided bar graph to illustrate age structure

5 Forecasting Population Size
Survivorship- The percentage of members of a group that are likely to survive at any given age. Survivorship curves- Graphs of survivorships

6 Forecasting Population Size
Fertility rates- The number of babies born each year per 1,000 women in a population Declines with increased education and economic independence for women 1.6 children per woman in developed countries 3.1 children per woman in developing countries Replacement level- Number of children a woman must have in order to “replace” themselves

7 Forecasting Population Size
Migration- The movement of individuals between areas. Immigration- Movement into an area Emigration- Movement out of an area

8 Declining Death Rates Life expectancy- The average number of years a person is expected to live. Most affected by infant mortality (death rate of infants under 1 year)

9 The Demographic Transition
Model that describes population growth changes. Based on observations of history Compares birth rates, death rates and population size Stages of the transition: Stage 1- Preindustrial Stage 2- Transitional Stage 3- Industrial Stage 4- Postindustrial

10 The Demographic Transition

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