Chapter 7: Human Populations
mod 22
Malthus vs. Norman Borlaug
in: immigration+bitrh
out: death+emigration (exit)
(always per 1000 people)
CBR-CDR = # people per 1000
example: global: 20 births and 8 deaths = 12+ per 1000 = 1.2%
doubling time: 70/%
TFR = average children per woman
replacement level: number to offset deaths
infant mortality: under 1 year
child mortality: under 5 years
population momentum: after ∆
mod 23
Demographic transition: 4 stages
phase 1: + births, + deaths = low population
phase 2: + birth, low deaths (clean water)= pop grows
phase 3: births lower (education), deaths lower = pop grows slowly
phase 4: births very low, deaths lower = decreasing population
IPAT: impact = population x affluence x technology
Paul Ehrlich (population bomb)
GDP vs. GNP (offshore countries)
GDP= economic activity+consumer spending+exports-imports
p.250 AP practice exam
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