SEPTEMBER 17-18 PICK UP A STUDENT NEWS SHEET FROM THE BACK OF THE ROOM QUIZ SEPTEMBER 19-21 Chapter 2- Population.

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Presentation transcript:

SEPTEMBER PICK UP A STUDENT NEWS SHEET FROM THE BACK OF THE ROOM QUIZ SEPTEMBER Chapter 2- Population

Happy Wednesday/Thursday

Population Pyramid Population pyramid: displays the percentage of the total population in five-year age groups

Population Pyramid Explained What can population pyramids tell us?  Sex ratio: number of males per 100 females  Dependency ratio: the number of people too old or too young to work compared to the number of people in their productive years (usually 0-14 and 65+)

Population Pyramid: China

Population Pyramid: USA, 1950

Population Pyramid: Japan

Population Pyramid, Mozambique

Population Pyramid: Travis County? In groups of four, sketch out roughly what you think the population pyramid of Travis County looks like. Bring up to the front and put on the board.

Components of Population Growth Crude birth rate: the total number of live births in a year for every 1,000 people alive in the society Crude death rate: the total number of deaths in a year for every 1,000 people alive in the society Total Fertility Rate: the average number of children a woman will have throughout her childbearing years Natural increase rate: the percentage by which a population grows in a year  Calculated by subtracting CDR from CBR (20-5= 15= 1.5%)

NIR Determining Factors Economic development (increases usually lead to decreases in fertility and growth rates due to healthcare, nutrition, employment, etc) Education (more education leads to less fertility and less natural increase due to contraception, prenatal care, etc) Gender empowerment (refers to the status and opportunities given to women; more economic and political power means a decrease in fertility rates) Healthcare (contraception leads to lowered fertility rates and therefore lowered natural increase, while hospitals, etc lower the infant mortality rate therefore raising natural increase) Cultural traditions (women encouraged to stay home and have lots of children will do so, causing the fertility rate to go up) Public policy (incentives for not having children in places like China can lead to a lower fertility and natural increase rate)

NIR Activity Split up into four groups and calculate the NIR of your given country. Once you’re done, talk to the people around you and try to figure out which country your NIR represents

NIR Activity Answers Afghanistan: CBR 38, CDR 14, NIR 2% Bangladesh: 21, 5, 1.6% Democratic Republic of the Congo: 35, 10, 2.5% Japan: 8, 9, -.1%

Doubling Time + Activity Doubling time: the number of years needed to double a population, assuming a constant rate of natural increase Calculate the doubling time of the world: NIR 1.2% Calculate the doubling time of the US: NIR 0.4% What could/should the world and the US be doing currently, in light of these numbers? (Think environment, agriculture, infrastructure, etc)

Generalizations & Exit Ticket Are the CBRs, NIRs, and TFRs of developing or developed countries higher? Why? Are the CDRs of developing or developed countries higher? Why? On a half-sheet of paper, write one paragraph (at least four sentences) describing what the CBR, the CDR, the TFR, and the NIR are and how they are calculated.