8.1 Geo Human systems and resource use Flashcards
Define the CBR (crude birth rate).
The number of births per thousand individuals in population per year.
Define CDR (crude death rate).
The numbers of deaths per thousand individuals in a population per year.
Define NIR (natural increase rate)
The rate of human population growth as expressed by percentage change per year.
Define the TFR (total fertility rate)
the average number of children born per woman while in age of fertility
Define DT. (doubling time)
The time It takes for a population to double in individuals.
what pattern has human population growth followed over the last 2000 years?
exponential curve.
why has the world population followed the pattern of an exponential curve?
because populations in the world have been following an accelerating rate of growth of which is proportional to the population size.
as our population grows, what are the main stresses being put on the earths systems?
more people require more resources.
deforestation
fossil fuels
pesticides
desertification
more people produce more waste
carbondioxide
polluting of rivers
what can be helpful and used to predict human population growth?
age-gender pyramids and the DTM.
what patterns is commonly seen in DM and why?
the pattern of decline in mortality and fertility of a county as a result of social and economic development.
what is illustrated in a DTM?
how a population transitions from a pre-industrial stage with high CBR and high CDR to a economically advanced stage with low or declining CBR and CDR.
what are the six main influences on population dynamics that you would want to exams on in an exam?
culture, historical, religious, social, political and economic.
why might culture have an effect on population dynamics?
In some cultures women are not expected to have jobs or careers, leading them to marriage after and making the age of baby marking younger than it would be in they had a job.
in agricultural culture more children as seen as more labour forces.
why might historical factors influence population dynamics?
traditions of people having larger families incase of child mortality which was more common.
what religus factors might be influencing population dynamics?
religion include family planning, most religions are pro-natalists.