-        Life expectancy

The average number of years to be lived by a group of people born in the same year.

-        Crude birth rate (CBR)

-        Crude death rate (CDR)

-        Developed nations

Developed nations is a nation with a lower living standard, underdeveloped industrial base.

-        Development nations

Development nations has a highly developed economy and advanced technological infrastructure relative to other less industrialized nations.

-        Rate of national increase (RNI)

-        Net migration rate (NMI)

-        Immigration

-        Emigration

-        Push forces

Make you don’t want to stay in this country.

Civil war.

Environmental degradation

Religious or ether persecution

-        Pull forces

Attract you, make you want to live in that country.

Better economic opportunity

Better health services

Religious freedom

Political freedom

-        Total fertility rate (TFR)

Average number of children born per women.

For a population to remain the same, the TFR must be 2.1

Higher than 2.1: population rises

Lower than 2.1: population falls