Population Growth

Population Growth

1. World

   • Population of world increasing at expotential rate - growing faster.
   • Population size
     • Birth rate - number of live babies born per 1000 of population per year.
     • Death rate - number of deaths per 1000 of population per year.
     • Affected by migration - movement of people from one area to another.
   • Natural increase - birth rate is higher than death rate. More people being born than dying so population grows.
   • Natural decrease - death rate's higher than birth rate.

2. Demographic Transition Model

   • Stage 1
     • Birth rate - high + fluctuating.
     • Death rate - high + fluctuating.
     • Pop growth rate - zero.
     • Pop size - low + steady.
     • Example countries - tribes in Brazil.
   • Stage 2
     • Birth rate - high + steady.
     • Death rate - rapidly falling.
     • Pop growth rate - very high.
     • Pop size - rapidly increasing.
     • Example countries - Gambia.
   • Stage 3
     • Birth rate - rapidly falling.
     • Death rate - slowly falling.
     • Pop growth rate - high.
     • Pop size - increasing.
     • Example countries - Egypt.
   • Stage 4
     • Birth rate - low + fluctuating.
     • Death rate - low + fluctuating.
     • Pop growth rate - zero.
     • Pop size - high + steady.
     • Example countries - UK, USA.
   • Stage 5
     • Birth rate - slowly falling.
     • Death rate - low + steady.
     • Pop growth rate - negative
     • Pop size - slowly falling.
     • Example countries - Japan.