1. Populations

2. Geographic distribution – the area a pop lives(range)

3. Population Density – the number of individuals in an area

4. Number of births Number of deaths Emigration (out) & Immigration (in)
Population Growth
Number of births
Number of deaths
Emigration (out) & Immigration (in)

5. In Springfield, 45 babies are born in the year 2008
In Springfield, 45 babies are born in the year people died that same year. What is the growth rate for the city?
Positive Growth rate = population increase Negative Growth rate = decrease

6. Exponential Growth –reproduce at a constant rate
Exponential Growth –reproduce at a constant rate. Occurs under ideal conditions (no limits)
J-shape curve

7. Logistic Growth – resources become less available, growth slows or stops
S-shape curve
Carrying Capacity – the number an environment can support

8. Limits to Growth
Limiting Factor – causes population growth to decrease
Density-Dependent Factors –depends on population size
competition
predation
parasitism and disease

9. Density-Independent Factors – does not depend on population size
Unusual weather
Natural disasters
Some human activities

10. DEMOGRAPHY

11. the study of human population growth - explains how populations change over time.

12. Demographic Transition – a dramatic change in birth and death rates
United States, Japan, and Europe population growth has stopped
ZERO POPULATION GROWTH

13. In order to achieve ZPG, each couple has only 2 children

15. AGE STRUCTURE DIAGRAMS
Show percentage of people alive at each age group

16. Which diagram above is:
1. A country where the king orders the deaths of all the baby boys
2. A country at war, many young men die in that war
3. A country with poor health care for women, many die in childbirth
4. A country where AIDS kills people in their 30s