-Demography is the study of population characteristics, such as growth rate,

age structure, and movement of individuals. 

Birth rate, death rate, and fertility differ considerably among different countries,

resulting in uneven population growth patterns around the world.-

 

Section 4.2: Human population growth

Define-age structure-

            -demography-

            -emigration-

            -immigration-

Section 4.2 Outline-

 -a good way to predict the size of a future population is to look at past trends-

  -demography-the study of human population growth characteristics-

  -human growth has been exponential over the last few years-

  -we survive because we can reduce the amount of crowding and stress. we can cure disease, and make more food-

  -growth rate- difference between birth rate and death rate-

  -people now are waiting longer to have kids, and having less of them-

  -different combos of birth and death rates have different affects on populations-

  -yes, the more young people you have now, the more child bearing able people you will have in the future-

  -age structure- refers to the proportions of the populations that are at different age levels-

  -immigration- organisms moving to another area-

  -emigration- organisms moving from one area-

  -makes it hard for demograhpers to accurately count population growth-