Minggu, 29 Januari 2012

Human Population

Birth and Death rate

Human Population increases each day. We could even say every 3 minutes 1 or more babies are born around the world. Human Population increases everyday, every months and every year. Human population increases depending on the birth and death rate.
1. Birth rate:
Birth rate are the number of babies that are born each day, every hours and every minutes.
This are some factors that causes a high birth rate:

  • Early marriages
  • Lack of knowledge of birth control

2. Death rate:
Death rate are the number of people that died in the years and months. Death rate increases everyday, every months and every year. Human population decreases because / depending on the death rate.
This are some factors that causes a high death rate.

  • Diseases
  • Natural disasters
  • Famine


Density
Human population is also measured by its density. When a place has many people living there the density will  increases.


Density may increases and decreases because of immigration and emigration. People who migrates is called migrants.


1. Immigration:
Immigration happen when people move from one country to another country / place. This action will increases the human population density. People who immigrates are called immigrants.


2. Emigration:
Emigration occurs when people move from the country to another country / place permanently. This action will decreases the human population density. People who emigrates are called emigrants.


Sample of a low density area

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