Human Population
What are the factors that affect the size of the human population ?
The main cause of population changes is the change in birth rate and death rate.
BIRTH RATE
A high birth rate may be caused by:
- early marriages
- lack of knowledge of birth control
A high death rate may be caused by:
- diseases
- famine
- natural disasters
POPULATION DENSITY
Population density refers to the number of people in a given amount of space.
HUMAN MIGRATION
Human migration is human movement from one area to another
Immigration
immigration takes place when people move into the country permanently .
Emigration
emigration takes place when people move out from the country permanently.
