Pop Revision 1
- 1. Birth rate Death rate Immigration Emigration What about what’s in the bath? What does this bath represent?!?
- 2. Population Change ALL population change is the result of natural change or migration During the next few weeks we will study the different factors that affect natural change, and the causes and consequences of migration.
- 3. Key Definitions Birth Rate ‘ the number of births per 1000 people per year’ Death Rate ‘ the number of deaths per 1000 people per year’ Natural Change ‘ the difference between the birth rate and death rate. It tells you by how much the population is changing per 1000 people each year’ Migration ‘ the movement of people from one area to another’
- 5. Population Change What do we know? Population has grown rapidly in the last 200 years Levelled off a little, but still expanding by 80million a year By 2050, population will be 9billion By end of the century, it may be 0%growth
- 6. Population Change What do we know? The growth within the world is not even Europe, N.America and Australasia have very low growth rates Only 20% of world’s population, by 2050 this will be 12% Europe’s population will shrink by 90million between now and 2050 In that period, China India and Pakistan will contribute most to global growth
- 8. What Causes Population Change?
- 11. DTM The Demographic Transition Model shows the changes in a country’s population over time It gives information on birth and death rates It has five stages
- 12. DTM Stage One High, fluctuating Stage Two Early expanding Stage Three Late expanding Stage Four Low, fluctuating Stage Five Fluctuating/declining
- 14. DTM It was based on Britain’s development, and some other industrialised countries, in the 19 th and 20 th Centuries They had gone through several ‘stages’ during their development It was found that other countries went through the same change
- 15. DTM STRENGTHS Shows change over time Can be related to the UK Easy to understand Puts events into a sequence, and helps to explain the changes WEAKNESSES Not as relevant for non-industrialising countries Doesn’t include migration Countries hit by HIV/Aids have gone back to stage one, so harder to predict their futures Original model has had to be adapted to include 5 th stage
- 16. DTM One good way to remember the countries at each stage – ABCD! A = Afghanistan B = Bolivia C = China D = Denmark E = Erm, Germany (Ein, Zwei, Drei?!?)