1. Higher Human Biology Demographic Trends Chapter 36

2. Lesson Aims To examine the differences in demographic trends in developing and developed countries To revise reasons for exponential growth of populations To examine the use of birth control on population growth

3. Demography A population depends on birth rate (br), death rate (dr), immigration rate (ir) and emigration rate (er). change in = br – dr + ir - er population size

6. Population Pyramids for Developed and Developing Countries

7. Population Control Population will increase until a new carrying capacity is reached. At this point one or more factors essential for life (e.g. food, clean water, clean air) will become limiting and exert a regulatory effect by increasing death rate.

8. Family Planning

9. Influences on Birth Control Religious beliefs Standards of medical care Economic situation Cultural and social backgrounds Educational opportunities Degree of status accorded to women

10. The Facts You Need to Know Page 21-22 from “demographic trends show that…” to “for whatever reason…”