Population Change Key Definitions

AQA AS Geography, Human Unit- Population Change

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  • Created by: Amy
  • Created on: 24-09-11 15:39

Natural Increase

  • when the birth rate exceeds the death rate
  • expressed as a percentage %
  • For example:

Brazil est 2009

BR=18/1000 (18 births per 1000 people)

DR=6/1000 (6 deaths per 1000 people)

NI= 18-6= 12/1000 or +1.2% per annum



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Natural Decrease

  • when the death rate exceeds the birth rate
  • expressed as a percentage %
  • For example:

Italy est 2009

BR= 8/1000 (8 births per 1000 people)

DR= 11/1000 (11 deaths per 1000 people)

ND= 8-11= -3/1000 or -0.3% per annum

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Net Migration Rate

  • the difference between the number of immigrants (people entering the country) and number of out-migrants (people leaving the country).
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Death Rate

  • number of deaths per 1000 people in the population per year
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Crude Birth Rate

  • number of births per 1000 people in the population per year
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Infant Mortality Rate

  • number of deaths of children under the age of 1, per 1000 live births per year
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Life Expectancy

  • average number of years that a person can expect to live
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Natural Change

  • the change in size of a population, dependant on the relationship between birth and death rates.

 

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Total Fertility Rate

  • average number of children born to a woman during her lifetime
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General Fertility Rate

  • the number of live births per year divided by the number of women aged between 15 and 49 in the population
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