POPULATION Flashcards
Define Birth rate
Number of live births per 1000 of the population per year.
Birth rate is usually high in less economically developed countries as there is less thought over family planning and contraception.
Define Death rate
Number of deaths per 1000 per year.
. Death rates are usually high in LEDCs because of a lack of health care and the amount of disease. It can also be relatively high in countries with an ageing population.
Define Infant mortality rate
The number of children that die before their first birthday per 1000 of the population per year. Also usually high in LEDCs because of the small amount of healthcare and vaccines that children will receive in MEDC.
Considered the most important as any money is usually invested in healthcare are protection for children
Define Fertility rate
The average number of children a women will have between the ages of 15 and 44. Normally high in LEDCs as there is a lack of contraception and sometimes it is vital to have a large family to work on the farms.
Define Life expectancy
The average age a person in that country can expect to live to. This is higher in MEDCs as there is a smaller death rate and a smaller infant mortality rate.
Define migration rate
The difference between the number of people who immigrate(in) and emigrate(out) per 1000 of the population per year
Define population density
Number of people living per square kilometre, larger figures are found in urban areas
Describe the demographic transition model graph.
Birth rate and death rate start high in stage one and population is low. moving into stage 2 the death rate drops and population increases rapidly as birth rate stays high. in stage 3 the birth rate drops and population continues to increase. The birth and death rate is low and fluctuating in stage 4 and the overall population starts to level out. The overall population starts to decrease in stage five as the birth rate drops bellow the death rate.
Describe and explain stage 1 of the DTM.
High fluctuating
Birth and death rate fluctuate at a high level, the population stays stable but low. No countries are currently at this stay but some tribes in the Brazilian rainforest are. There is no birth control, family planning and education is poor which contributes to the high birth rate, as infant mortality is high at this stage people also have more children to replace ones that may have died. Death rate is high and life expectancy is low because there is poor health care, sanitation and diet which leads to disease and starvation. Birth and death rate are around 35/1000
Describe and explain stage 2 of the DTM.
Early expanding
Death rate falls but birth rate remains high causing a rapid increase in population. There is still little birth control, education and family planning and children are needed for labour to tend to the family farm. However health care, sanitation and diet has improved which has increased life expectancy and reduced the death rate. Nepal and Afghanistan are countries that are in stage 2. Birth rate remains at about 35/1000 but death rate falls to about 15/1000.
Describe and explain stage 3 of the DTM.
Late expanding
Birth rates decline rapidly while death rate continues to fall steadily, the population increases but at a slower rate. Birth rates decrease due to use of birth control, family planning and improvements to education. The economy moves more towards manufacturing so there isn’t advantages of having a large family for a farm. More women start to work in this stages which also see a decrease in the birth rate, but it may also be movement from the government which has reduced the birth rate. Egypt is a country in stage 3. Birth rate drops to 13/1000 and death rate falls to about 10/1000.
The rise of Newly Industrial countries like Malaysia, Taiwan and Singapore have seen an increase in the number of countries in this stage.
Describe and explain stage 4 of the DTM.
Low fluctuating
Birth rate and death rate now fluctuate at low levels as the population remains stable but high. Birth rate stays low because of increased access to luxuries like holidays and technology means there is less money to spend on having more children. Most of Europe and the USA are in stage 4. Birth rate continues to fall to about 10/1000 and death rate remains at 10/1000.
Describe and explain stage 5 of the DTM.
Decline
For the first time the population starts to decrease as the birth rate continues to reduce. Children are becoming expensive to raise and many have dependant elderly relations to care for. The death rate remains steady as there are more elderly people dying of old age even though there are further improvements in health care. Japan and Italy are examples of countries in stage 5. They may experience problems as the workforce won’t be able to sustain the economy and large amounts of money has to be spent on healthcare.
How is the DTM useful?
- Gives a good generalised picture of how a population can change over time
- It’s easy to compare a country to the DTM and analyse what stage it is in
- It can be used to forecast how a countries population might change which can help governments when deciding whether to introduce policies and immigration laws
What are the limitations of the DTM?
- The original data was from developed countries and therefore may not be a valid representation for other countries who will not experience the exact same process
- The original DTM didn’t have stage 5, this has been recently added as countries no longer fitted in stage 4
- It doesn’t take into to account education and the role of women which have a large effect on birth rate
- Different customs in different countries will impact how and if they move through the DTM, for example the catholic church condemns the use of contraception
- Extreme poverty and low levels of development may cause a lack of population growth and prevent LEDCs from passing through all the stages
- The DTM can’t predict exactly when each countries will reach each stage or how long they will be in that stage for
- It doesn’t consider migration or other factors that affect a population so that it doesn’t fit, for example population control policies in china, infectious diseases like HIV/Aids in Africa and civil war in places like Rwanda, Sierra Leone and Sudan