Presentation on theme: "Higher Human Biology Demographic Trends Chapter 36."— Presentation transcript:
Higher Human Biology Demographic Trends Chapter 36
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
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
Population Pyramids for Developed and Developing Countries
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.