Welcome!

Please get out your histogram and demographic transition worksheet from this weekend for an extra credit stamp!

Please read the board!

Reading skills and graph interpretation

Demographers use histograms

Graph of age distribution at particular time Cohort size Male vs. female Pre-reproductive Reproductive ages Post reproductive

Cohorts move up graph as they age – US baby boomers (1946-1964)

US generations

Baby boomers (1946-1964) X generation/ baby bust – (1965-1976) Echo boom / Generation Why (Y) (1977-

2000) Millennial generation (2000-2010)

Social and economic considerations: Geriatric or infant health care? Education or retirement spending?

Histograms can also be used to predict future population trends based on an important assumption

Check for understanding

What is the name of these graphs? What do the horizontal thirds represent? What do the two sides represent? Which cohort would tell you about IMR? What aspect do you consider when

predicting future population trends? What assumption is made in making future

populations with these graphs?

The second important graph

Check for understanding

Why does death rate fall with industrialization?

Why does birth rate fall?

Why does death rate fall first?

At what two points is growth stable?

Whole Earth Discipline – #3 Based on this reading, would the author agree or disagree with the demographic transition theory? Provide multiple examples from the text to defend your argument. HOW DO YOU ANSWER THIS QUESTION???

Check out these histograms

http://www.census.gov/ipc/www/idb/informationGateway.php