Population Change Flashcards
How has the world population been changing since 1800?
The world population has been exponentially growing (continually increasing)
How has the population changed (in billions) since 1800?
in 1800 the population was about 1 billion but has exponentially increased- reaching 7 billion in 2011
Where is the population expected to settle? (in billions)
In the future the population is expected to settle at around 9 billion
What is natural change?
The difference between the birth and death rate
What is the birth rate?
The number of live births per 1000 people per year
How many stages are there in the demographic transition model?
There are 5 stages
What are the stages of the demographic transition model?
1: High Fluctuating 2:Early expanding 3:Late expanding
4: Low fluctuating 5:Natural decrease
What do the names of the stages in the demographic transition model refer to?
The birth rate - NOT the population
What is the replacement rate?
A birth rate which is high enough for a new generation to be the same as the previous generation
What are the shapes of the population structures in stages 1, 2 and 3?
1: Concave triangle 2: triangle 3: Half an oval
What are the shapes of the population structures in stages 4 and 5?
4: semi-oval with tapered base 5: pentagon
What are some places at stages 1, 2 and 3 in the DTM?
1: Traditional rain-forest tribes 2: Afghanistan 3: India/Kenya
What are some countries at stages 4 and 5 in the DTM?
4: USA/UK 5: Germany/Japan
What are 4 factors which affect population growth?
Agricultural change, urbanisation, education, emancipation of women (all decrease the population growth)
How does agricultural change affect population?
Mechanisation means less farm labourers are needed = larger families not needed = decreased birth rate