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Human Population Growth

Human Population Growth. Brain Pop Movie And Quiz!. Human Population Trends Historical Perspective. Limiting Factors Scarce Food Incurable Diseases Only ½ the Children in the World Survived to Adulthood Therefore families had many children to ensure some would survive.

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Human Population Growth

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  1. Human Population Growth Brain Pop Movie And Quiz!

  2. Human Population TrendsHistorical Perspective • Limiting Factors • Scarce Food • Incurable Diseases • Only ½ the Children in the World Survived to Adulthood • Therefore families had many children to ensure some would survive.

  3. History of Human Population Trends Source: Glencoe, Biology, 2009

  4. History of Human Population Trends cont’d Source: Glencoe, Biology, 2009

  5. Human Population Trends • Human population tends to increase with time. • 500 years ago a shift to rapid growth. • Agriculture and Industry • Reliable Food Supply • Shipping • Improved Sanitation • Healthcare • All decreasing the death rate and increasing life expectancy.

  6. Source: Glencoe, Biology, 2009.

  7. Increase in Human Population Growth Over Time (Prentice Hall, Biology, 2003)

  8. Source: Glencoe, Biology, 2009.

  9. Patterns of Population Growth • Demography • Scientific study of human population growth. • What factors do scientists need to take into consideration to predict population growth? • Birthrates • Death Rates • Age Structure

  10. Demographic Transition • Dramatic change in birth and death rates • As countries become developed there is a shift in birth rate and death rate • What is happening in the graph?

  11. Demographic Transition Cont. • Transition is complete when the birthrate falls to meet the death rate. • Zero Population Growth • What countries have undergone demographic transition? • US • Europe • Japan

  12. Population Growth Rates of Countries Source: Glencoe, Biology, 2009.

  13. Predicting Population Growth • Age-structure diagrams • Graphs numbers of people in different age groups in the population • How could this help Biologists predict population growth?

  14. Interpreting Age-Structure Diagrams

  15. Pre-Reproductive, Reproductive, and Post-Reproductive Classifications Source: Glencoe, Biology, 2009.

  16. Developed Vs. Underdeveloped Country • What are the characteristics of each country? • Developed • Underdeveloped

  17. Human Carrying Capacity • Estimated to be around 8-10 billion people • Threat of disease and starvation once reached • Technology has temporarily increased human carrying capacity • FOOD FOR THOUGHT ACTIVITY Source: Glencoe, Biology, 2009

  18. Graphic Sources • http://www.coremedicalgroup.com/pix/scrubs_lg.jpg • http://nue.okstate.edu/Rockefeller/obregon.jpg • http://www.eatonco.org/_derived/2L-sanitation.htm_cmp_sanitation010_bnr.gif • http://www.geography.learnontheinternet.co.uk/images/popn/demographictransition.gif • http://www.census.gov/cgi-bin/ipc/idbsum.pl?cty=CF • http://www.census.gov/cgi-bin/ipc/idbsum.pl?cty=US

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