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17 Cards in this Set

  • Front
  • Back
what is the ecumene?
areas of human habitation
what is arithmetic density?
the total number of people divided by the total land area
what is physiological density?
the number of people supported by a unit of arable land (total number of people divided by the total amount of arable land)
what is agricultural density?
number of farmers per area of arable land
what is doubling time?
the number of years it takes to double a population
what is sex ratio?
the number of males per 100 females in the population
characteristics of stage 1 in the demographic transition
high CBR and CDR with low rate of growth
characteristics of stage 2 in the demographic transition
low CDR, high CBR, with rapid population growth
characteristics of stage 3 in the demographic transition
low fertility, CBR, and NIR
characteristics of stage 4 in the demographic transition
low CBR and CDR with nearly zero natural increase
characteristics of possible stage 5 in the demographic transition
low CBR, increasing CDR, with a negative NIR
what is the elderly support ratio?
the number of working age people divided by the number of persons 65 and older
stage 1 in the epidemiological transition
infectious and parasitic diseases and attacks by animals and other humans were causes of death at the time (high CDR)
stage 2 in the epidemiological transition
receding pandemics (rapidly declining CDR)
stage 3 in the epidemiological transition
decrease in deaths from infectious diseases and increase in chronic disorders (moderately declining CDR)
stage 4 in the epidemiological transition
major degenerative causes of death linger but life expectancy is extended through medical advances (low but increasing CDR)
reason for possible stage 5 in the epidemiological transition
infectious diseases return and new ones emerged