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Understanding Demography: Malthus, Ehrlich, IPAT, and Population Dynamics

In this lesson, students will review previous tests and essays while also preparing for an upcoming retest. Major topics will include Thomas Malthus and Paul Ehrlich's contributions to demography, the IPAT model, and demographic concepts such as carrying capacity and age structure diagrams. New material will focus on China's One Child policy and its implications, issues arising from rapid population growth, and the nuances of birth and death rates. Students are encouraged to think critically about population control, resource competition, and historical events like the Russian Revolution.

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Understanding Demography: Malthus, Ehrlich, IPAT, and Population Dynamics

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Presentation Transcript

  1. Homework from last week • Review your test and correct your essay questions. • Friday we will review the questions and then re-test Thursday. • Are we ready to take the test?

  2. Homework for Next class • Re-read pages 196-205 paying close attention to the following: • Thomas Malthus & Paul Ehrilich • What is the IPAT model? • Read pages 206 - 208 • What is demography (demographics)? • Age structure diagrams on 206, 207 & 208

  3. New Material • Quick review: • What is Carrying Capacity? • Explain the graph.

  4. New Material / review • China’s One Child policy. What are the issues with it? • China is running out of girls. Why? • Could this cause a drop in the population? • Could it lead to extinction? • Yes!

  5. New Material • Does the US have a form of population control? • I say yes, why? • What are the issues with a rapidly growing population? • 1. Increase in pollution • 2. Increase in disease • 3. Increase competition for resources (food, water, land, air,…. • The Russian Revolution was based on Peace, land and bread because people were starving.

  6. New Material • Birth Rate: • 19 births/1,000 population • 131.4 million births per year • 360,000 births per day • 15,000 births each hour • 250 births each minute • 4 births each second of every day • Death Rate: • 8 deaths/1,000 population • 55.3 million people die each year • 151,600 people die each day • 6316 people die each hour • 105 people die each minute • almost 2 people die each second

  7. New Material • Population Clock • http://www.census.gov/popclock/

  8. New Material • Thomas Malthus – who is he and why is he important? • Paul Ehrlich – who is he and why is he important? • One prediction that they had was: “population growth has indeed contributed to famine, disease, and conflict.” Is this true?

  9. New Material • Strong nations tend to have slow population growth. Why? • What is IPAT? • Impact = Population x Affluence x technology, sometimes add S for sensitivity, meaning development in a sensitive area. • Demography? What is it?

  10. New Material • Age Structure diagrams

  11. New Material • Populations are determined by: • Birth rate, death rate, immigration rate and emigration rates. • TFR – Total Fertility Rates: • Average number of children born per woman her lifetime • RF – Replacement Fertility: • Think of your family. If you an only child then negative growth, one sibling then zero growth..

  12. New Material • Transition Demographics – explain the chart below

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