Studied by 2 people
The study of population is important because
More people are alive than ever before
2.Virutally all local population growth is in developing countries
3.The world population increased at a faster rate during the second half of the 20th century than ever before.
Carrying Capacity
the maximum population size of a species that an environment can sustain given the available resources .
Overpopulation
when the number of people exceed the carrying capacity
Demography
The study of population characteristics
We can understand how population is distributed by two properties..
Concentration and Density
Two thrids of the worlds population is in what four regions?
East Asia, South Asia, Europe, Southeast Asia
arithmetic density
Total number in an area
Physiological density
The total number of people per unit of arable land
Agricultural Density
The total number of farmers per unit of arable land.
Arable Land
Land suited for agriculture
Natural Increase Rate NIR
The PERCENTAGE by which a population grows ina year
doubling time
The time it takes for a population to double in size
Crude birth rate (CBR)
the total NUMBER of live births in a year per 1000 people alive in a society.
total fertility rate(TFR)
measures the adverage NUMBER of children a women will have throughout childbearing years. (age 15-49).
Replacement Rate (RR)
2.1 (.1 to account for deaths and some women may not have kids)
2.2 or higher=GROWTH 2.0 or lower=DECREASE
Developed countries=...
lower agricultural density
Developing countries=...
Higher agricultural densitys
infant mortality rate (IMR)
The annul NUMBER of infants deaths under one year of age, compared with total live births. OR the number of infants deaths per 1,000 births.
Crude death rate (CDR)
Total number of deaths in a year per 1,000 people in a society.
combined CDR for developing countries is
lower than the combined rate for all developed countries.
Difference in CDR is..
much less extreme than CBR
Neo Malthusians
Believe in Thomas Malthus and his theory, but the expect that its not just food. Its resources. (Underlying concept) World resources are limited.
Thomas Malthus was the first to claim..
The worlds rate of population increase was far outrunning the development of food supplies
Neo Malthusians believe...
The world faces a bad future where people are in desperate competition for food, water, and energy.
As space declines in quantity...
more effort is needed to yield the same amount of crops. This.. -extends the working day for women
maternal mortality rate
the number of maternal deaths(Mothers die) during a given time period per 100,000 live births during the same time period
Note 
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