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ap. unit 2
unit 2 vocab words
23
Geography
9th Grade
10/14/2010

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Cards

Term
overpopulation
Definition
the number of people in an areas exceeds the capacity of the environment to support life at a decent standard of living
Term
ecumene
Definition
portion of the earth's surface occupied by permanent human settlement
Term
population density
Definition
number of people occupying an area of land
Term
arithmetic density
Definition
the total number of people divided by the total land area
Term
physiological density
Definition
the number of people per unit of area of arable land, which is land suitable for agriculture
Term
agricultural density
Definition

the ratio of the number of farmers to the total amount of land suitable for agriculture

 

Term
arable land
Definition
land suitable for farming
Term

crude birth rate (CBR)

 

Definition
the total number of live births in a year for ever 1,000 people alive in society
Term
crude death rate(CDR)
Definition
the total number of deaths in a year for 1,000 people alive in the society
Term
natural increase rate (NIR)
Definition
the percentage growth of a population in a year, computed as the crude birth rate minus the crude death rate
Term
total fertility rate (TFR)
Definition
the average number of children a woman will have throughout her childbearing years
Term
doubling time
Definition
the number of years needed to double a population, assuming a constant rate of natural increase
Term
infant mortality rate (IMR)
Definition
the total number deaths in a year among infants under 1 year old for every 1,000 live births in a society
Term
life expectancy
Definition
average number of years an individual is expected to live, based on current social, economic, and medical conditions
Term
carrying capacity
Definition
largest number of individuals that can survive over a period of time in a given environment
Term
demographic transition model
Definition
process of change in a society's population
Term
demographic equation
Definition
calculates total population births-deaths +/- net migration = total population
Term
demographic momentum
Definition
continual population increase despite reduced reproductive rates
Term
zero population growth
Definition
demographic transition model stage 4, CBR=CDR
Term
population pyramind
Definition
bar graph that displays a country's population distribution by age and sex age distribution
Term
population projection
Definition
the estimated population in a certain time in the future
Term
dependency ratio
Definition
number of people who are too young or too old to work, compared to the number of people in their productive years
Term
sex ratio
Definition
number of males per hundred females in the population
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