Population Flashcards
(27 cards)
population distribution
pattern of where people live and how population is spread out
population density
measurement of the number of people in an area per km squared.
how do you calculate population density?
population / area (km squared) = people per km squared
densely populated
An area that contains a lot of people
Sparsely populated
an area which contains few people
Why is population distribution uneven?
human reasons
Cost of living
Education
Job opportunities
Economy
Social influences
Why is population distribution uneven?
physical reasons
Relief
climate
natural benefits and resources
Densely populated area examples
India
China
Along the River Nile
Sparsely populated area examples
Sahara desert
Australia
North Russia
Population explosion
Its taking us less and less years to increase in population
risks of overpopulation
climate change
resource depletion
overgrazing
CO2 emissions
higher risk of large scale disasters eg. pandemics
What is the demographic transition (DTM) model?
A simplified version of how population has changes over time
Birth rate
Number of live births per 1000 of a population in a year
Death rate
Total number of deaths per 1000 of a population in a year
Natural increase
the difference between the number of live births and deaths generally calculated over a year
Stage 1 of the DTM
Population is low but there are high birth and death rates
Stage 2 of the DTM
Population begins to increase as death rates fall due to improvements in medicine and sanitation. Birth rates remain high.
Stage 3 of the DTM
Population is still increasing but more slowly now as birth rates fall due to increased access to contraception and family planning, improvements in health education and a general desire for smaller families. Death rates continue to fall but at a slower rate than stage 2.
Stage 4 of the DTM
Population id now high but as birth rates and death rates are now low, the rate of population change is steadier than before
Stage 5 of the DTM
Population may start to decline at this point due to low birth rates and an ageing population leading to a slight increase in death rates
Emancipation of women
Improved status for women. For example more girls are educated at school and have a career.
Agriculture
Changes in farming practise have led to an increase in machinery and less manual labour.
Rural- Urban Migration
Today, 54% of the worlds population live in urban areas.
contraception
Increased acces to this and family planning has led to the average global family size falling from 5 to 2 children.
