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Name_______________________________________AP HG 2.3Date______________POPULATION & MIGRATIONWhere is the world’s population increasing?DO NOW: -544830192405Why do you think our population keeps growing? Think of TWO reasons!Where is population growing the fastest? Take a guess!3957292-560373MEASURING POPULATION GROWTHCrude= concentrated on the society as a wholeCRUDE BIRTH RATE (CBR): total number of _____________________________ for every 1,000 people alive in the societyCBR = 20 = for every 1,000 people in the country, 20 babies are born over a 1 year period CRUDE DEATH RATE (CDR): total number of _____________________________ for every 1,000 people alive in the societyCDR = 20 = for every 1,000 people in the country, there are 20 deaths over a 1 year period NATURAL INCREASE RATE (NIR): NIR = subtracting _____________________________ after first converting to two measures from numbers of 1000 to percentages (numbers of 100) CBR is 20 and CDR is 5 (both per 1,000). Then NIR is 15 per 1000 or 1.5%. 1963 =Today = right9704-353410-50061NATURAL INCREASE RATEThe rate of natural increase affects the ________________________ which is the number of years needed to double a population, assuming a constant rate of natural increase. NIR was 2.2 back in 1963, doubling time was 35 years. Had the 2.2% rate continued, instead of declining to 1.3% - our population today would be half a billion higher! BIRTHS & DEATHS Natural increase occurs when births (________________) exceeds deaths (______________). TOTAL FERTILITY RATE (TFR)INFANT MORTALITY RATE (IMR)LIFE EXPECTANCYaverage _________________ ________________________ ________________________ throughout her childbearing years.annual number of __________ __________________________ _____________, compared with total live birthsaverage number of years a ____________________ _____________________ at current mortality levelsright185420-21699915013-217000207835MAP QUESTIONSWhich regions have the highest natural increase rate?Which regions have the highest crude birth rates?Which regions have the highest total fertility rates?Which countries have the lowest total fertility rates? What is the total fertility rate in the United States? Europe? Which regions have the highest infant mortality rates?Which countries have the lowest infant mortality rates?What is the infant mortality rate in the United States?Which regions have lowest life expectancy? What is the life expectancy in these regions?Which countries have the highest life expectancy rates?What is the life expectancy in the United States? In Europe?DISCUSSION QUESTIONS What might account for the differences in infant mortality rates and life expectancy in different regions of the world? Describe what happens to a country’s population if its CDR exceeds its CBR.Sum up three conclusions from these maps about population and population growth in MDCs (more developed countries) compared to LDCs (less developed countries). ................
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