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The natural movements of
       the population
The changes produced by biological factors
 receive the name of natural movements

                               Natural
 Natality Mortality
                             Increase
The Birth rate
                                              It is calculated by
                                              dividing the number of
                                              births a year in a place
                                              by total population ; the
                                              result is multiplied by
                                              one thousand.
                                              Remember, it is
                                              expressed in so many
                                              people per thousand
                                   TN = number of births a year
                                         total population          * 1000



If one country with a population of 100.000 inhabitants had been born
2000 children . Which will be the birth rate?


TN= 2000
    100.000     * 1000 =   20 %0              Remember per thousand
Birth rate map
The fecundity rate
                                                          It measures the number of
                                                          children per woman in fertile
                                                          age (15-49 years) . In order to
General fecundity rate is                                 guarantee the maintenance of the
calculated by dividing the                                population we need a figure of
number of babies that are
                                                          about two
born alive in one year by
the number of women in
fertile age




             There are 20.000 women in fertile age and this year has
             been born 150 children . Calculate the fecundity rate .


             GFR=       150
                      20.0000     *1000 = 1, 5 %0 Will the maintenance
             of the population be guaranteed or not ?
Mortality or death rate
                                It is the number of deaths a year in a population . It is
                               calculated by dividing the number of deaths a year in a
                               place by its total population ; the result is multiplied
                               by thousand




 There are 1.000 deaths in a country and there , there are
 30.000 people . Calculate this death rate


    DR= 1000
        30.000       *1000 = 33.3 %0
Think: Why the Spanish death rate is higher than Chinese death rate?
Explain it !!!!
Infant mortality rate
                                               It indicates the number of deaths of babies under
                                               one year of age per 1,000 live births. The rate in a
                                               given region, therefore, is the total number of
                                               newborns dying under one year of age divided by
                                               the total number of live births during the year,
                                               then all multiplied by 1,000. The infant mortality
                                               rate is also called the infant death rate (per 1,000
                                               live births).




There are 28 dead children and 1.750 live births . Calculate this
infant mortality rate

 IMI= 28
     1.750      * 1000 = 16 %0
Explain this map!!!!
Life expectancy
                  It is the average number
                  of years that a newborn
                  child is thought to live .
                  It is higher in the rich
                  countries
Natural increase
           It is the existing difference between the
           number of births and deaths in a population
           at given time. RNI= BR-DR
           It is positive when the figure of births is
           higher than figure of deaths and it is negative
           the other way round

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The natural movements of the population

  • 1. The natural movements of the population The changes produced by biological factors receive the name of natural movements Natural Natality Mortality Increase
  • 2. The Birth rate It is calculated by dividing the number of births a year in a place by total population ; the result is multiplied by one thousand. Remember, it is expressed in so many people per thousand TN = number of births a year total population * 1000 If one country with a population of 100.000 inhabitants had been born 2000 children . Which will be the birth rate? TN= 2000 100.000 * 1000 = 20 %0 Remember per thousand
  • 4. The fecundity rate It measures the number of children per woman in fertile age (15-49 years) . In order to General fecundity rate is guarantee the maintenance of the calculated by dividing the population we need a figure of number of babies that are about two born alive in one year by the number of women in fertile age There are 20.000 women in fertile age and this year has been born 150 children . Calculate the fecundity rate . GFR= 150 20.0000 *1000 = 1, 5 %0 Will the maintenance of the population be guaranteed or not ?
  • 5. Mortality or death rate It is the number of deaths a year in a population . It is calculated by dividing the number of deaths a year in a place by its total population ; the result is multiplied by thousand There are 1.000 deaths in a country and there , there are 30.000 people . Calculate this death rate DR= 1000 30.000 *1000 = 33.3 %0
  • 6. Think: Why the Spanish death rate is higher than Chinese death rate? Explain it !!!!
  • 7. Infant mortality rate It indicates the number of deaths of babies under one year of age per 1,000 live births. The rate in a given region, therefore, is the total number of newborns dying under one year of age divided by the total number of live births during the year, then all multiplied by 1,000. The infant mortality rate is also called the infant death rate (per 1,000 live births). There are 28 dead children and 1.750 live births . Calculate this infant mortality rate IMI= 28 1.750 * 1000 = 16 %0
  • 9. Life expectancy It is the average number of years that a newborn child is thought to live . It is higher in the rich countries
  • 10. Natural increase It is the existing difference between the number of births and deaths in a population at given time. RNI= BR-DR It is positive when the figure of births is higher than figure of deaths and it is negative the other way round