Population Dynamics Population Dynamics By DexterBy Dexter
Demographic terms Demographic terms 2BIRT H RATE DEAT H RATE INFANT MORTA LITY RATE CHILD MORTA LITY RATE LIFE EXPECTA NCY NATURA L POPULA TION GROWTH POPULA TION GROWTH RATE
Definitions Definitions ⋆Birth rate is the number of live births per 1000 population in a year. ⋆Death rate is the number of deaths per 1000 population in a year. ⋆ Infant mortality rate is the number of deaths of children under one year of age per 1000 live births per year. ⋆ Fertility rate is the average number of children a woman has during her lifetime. ⋆ Life expectancy at birth is the average number of years a newborn infant is expected to live.⋆ Birth rateis the number of live births per 1000 population in a year. ⋆ Death rateis the number of deaths per 1000 population in a year. ⋆ Infant mortality rateis the number of deaths of children under one year of age per 1000 live births per year. ⋆ Fertility rateis the average number of children a woman has during her lifetime. ⋆ Life expectancyat birth is the average number of years a newborn infant is expected to live. 3
“ “ ⋆Natural population growth / Natural increase= Birth rate – Death rate ⋆ Population growth rate = × 100 ⋆Natural population growth / Naturalincrease= Birth rate – Death rate ⋆ Population growth rate =× 100 ⋆ ⋆ 4
QUESTION.1 QUESTION.1 The population of an island was 1000 one year ago. The birth rate for the island last year was 50 and the death rate was 20. What was the natural population growth? What is the total population of the island now? What is the growth rate of the population?The population of an island was 1000 one year ago. The birth rate for the island last year was 50 and the death rate was 20. What was the natural population growth? What is the total population of the island now? What is the growth rate of the population?
ANSWER 1 ANSWER 1 Natural population growth = 50 – 20 = 30 people per 1000.
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