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Population Growth
- 1. Population Clock How many people are there in the world NOW?
- 2. Learning Objectives • You will understand these key concepts: Population change, birth and death rates, the demographic cycle, using the correct key terms. • You should be able to describe how different factors influence population size • You may be able to give specific examples of countries at different stages of the demographic cycle
- 3. What factors influence Diseases birth & death rates? like malaria, tuberculosi s, cholera Several religions Better roads and and typhoid encourage big communications can cause Women have a better families mean that food many education now and and emergency deaths. careers. They have less services can reach time for a family and all areas of the have fewer children country, so fewer No wonder so many people die. babies are born – Improved medical there’s no family care and more planning or birth doctors and control available. nurses produce Parents want to buy lower death rates. things for their So many children die children, so they have before they are 5 a small family and can years old that Few doctors and spend their money on parents have lots of hospitals mean that just 1 or 2 children. babies in the hope even simple injuries that at least some and illnesses can kill. will survive. Poor farmers need lots of children to A big family is a Clean water and help them work the kind of insurance proper sewage land and help earn policy, making sure systems keep money. that there are people healthy children and grandchildren to look after you when you are old.
- 4. Influence birth or death rates? Increase Clean water and proper sewage systems keep or people healthy decrease? So many children die before they are 5 years old that Why? parents have lots of babies in the hope that at least some will survive.
- 5. Factors influencing population growth Birth rate Death rate Impact on population size increase decrease
- 7. World map by population size
- 8. World map by number of Births
- 9. • Notice how Japan, Europe and the US shrinks? More children are born each year in Africa than are born in the Americas, all of Europe and Japan put together. Worldwide, more than a third of a million new people will be born on your birthday this year.
- 10. How have population growth patterns changed?
- 11. Stages • Stage 1 Birth rate and death rate are high - low natural increase - low total population • Stage 2 Birth rate is high - death rate is falling - high natural increase (population growth) • Stage 3 • Falling birth rate - low death rate - high natural increase (population growth) • Stage 4 Birth rate and death rate is low - low natural increase - high total population
- 12. ILA • Stick your copy of the demographic transition model onto a double page in your book. • Use the links on the blog.to annotate/ explain what the model is showing • The web address for the blog is http//geographylost.blogspot.com or ‘google’ geographylost.