1. Objective: Students will study the issue of overpopulation Essential Question: What will happen to humans Lang Obj: Students will record key vocabulary and discuss in small groups Natural Increase

2. Review for quiz Reread notes Box key vocabulary Circle most important main idea Note Revisit

3. Density Quiz  Define Arithmetic Density  Define Physiological Density  Define Agricultural Density

4. Crude birth rate (CBR)-  Crude birth rate (CBR)-the total number of live births in a year of every 1,000 people alive  A CBR of 20 means that for every 1,000 people 20 people are born  EBQ:  In a county of 300 million people with a CBR 46 how many people are born in a year?  300,000,000 / 1,000 = 300,000 x46 =13,800,000

5. CBR

6. Crude death rate(CDR)-  Crude death rate(CDR)-the total number of deaths in a year for every 1,000 people  This is also expressed as the annual (yearly) number of deaths per 1,000 population

7. Natural increase rate (NIR)  Natural increase rate (NIR)- the percentage by which a population growth in a year.  Computed by subtracting CDR from CBR  CBR 20 – CDR5 = NIR 15 (This term natural means that the growth rate excludes migration)

8. NIR

9. Growth  The NIR for the world is 1.2%  80 million people are add to the world annually  7,324,782,000 in the world today  With such a large number even a 1 % change could make a big swing of population  If the NIR increased to 2% the population would increase by 132 million a year

10. Doubling time  Doubling time the number of years needed to double a population, (constant) rate of increase  1.2 NIR the world population will double to in 54 years  and be 24 billion people in 2100.  All the natural increase is clustered in LDC’s.  NIR 2% in Africa, Asia, Latin America, and Middle East  2/3rds of world growth has been in Asia  Europe has a negative NIR

11. Pictures  Make a picture in your notebook to explain each of our previous main ideas  CBR  CDR  NIR  Doubling time  This should help you mem the definition, no stick figures  Be sure to rewrite the definition with the picture.

12. Sum and Question Ticket out the Door

14. Arithmetic Density  The total number of people divided by the total land area (also called population density)  This compares conditions in different countries  And number of people trying to live in give piece of land  Answers the Where question  United States  300 million people  Land area is 9.6 million square Kilometers or3.7 million square miles  300,000,000/960,000,000= 31 persons per KM or 300,000,000/ 370,000,000= 80 persons per square mile

15. Math test RankCountry/RegionPopulationArea (km 2 ) Density (Pop. per km 2 ) 1 Bangladesh 157,457,000147,570 2 Taiwan (R.O.C)Taiwan23,361,14736,190 3 South Korea 50,219,66999,538 4 Rwanda 11,262,56426,338 5 Netherlands 16,919,13941,526

16. With population above 10 million Rank Country/Regio n PopulationArea (km 2 ) Density (Pop. per km 2 ) 1 Bangladesh 157,457,000147,5701067 2 Taiwan (R.O.C)Taiwan23,361,14736,190646 3 South Korea 50,219,66999,538505 4 Rwanda 11,262,56426,338428 5 Netherlands 16,919,13941,526407 6 India 1,263,680,0003,185,263397 7 Haiti 10,413,21127,750375 8 Belgium 11,239,75530,528368 9 Philippines 102,078,300300,076340 10 Japan 127,290,000377,944337

17. Physiological Density  Arable land- land suited for agriculture  The number of people supported by a unit of area of arable land is physiological density.  This creates a more meaningful number as it compares people to usable land  US 172 persons per square kilometer of arable land  Egypt 2,580 persons per square kilometer of arable land

18. Elbow Buddy Q’s Physiological Density.  What does the difference in physiological densities demonstrate between US and Egypt?  Shows that crops must feed far more people  How does physiological density create more pressure on countries?  Land has to produce more food  Compare the physiological density of Egypt to the arithmetic, what does this show you?  understand the capacity of land to grow enough food for its people. Egypt large difference between two densities, indicates that most of the county’s land is unsuitable for agriculture. 95% live on the Nile river valley

19. Agricultural Density  The ratio of the number of farmers to the amount of arable land.  shows difference of countries w/ sim physiological densities but produce significantly different amount of food  Typically MDC have lower agricultural density bc of tech and finance  USA has has 2 farmers pers square kilometer

20.  A  Why do MCD countries have a small Arg density?  If MCD people aren’t working on farms what do they do?  Compare Bangladesh and the Netherlands, both have high physological den but different arg. Why?  Compare Netherlands to India. NTL has high Phy Den while Inida has lower Arg Den. Expalin