Population and migration Flashcards
Population
Number of people living in a particular area
Crude Birth Rate
Number of live births per 1,000 people per year
Crude Death rate
Number of deaths pr 1,000 per year
Natural increase
When birth rates are higher than death rates
Natural Decrease
When death rates are higher than birth rates
What is the DTM
Demographic Transition Model
What happens in the first stage of the DTM
Description–Birth & Death rates are high so pop is low and not growing.
Explanation–
Birth rates are high as families are having many children as infant mortality is high.They also need larger families to work land.
Death rates are high as poor sanitation and lack of clean running water causing diseases like cholera to spread more quickly.Also lack of medicine
What happens in the second sage of the DTM
Description–Death rate starts to fall but birth rate remains high eg.India
Explanation–
Birth rates are high as couples were having larger families to work the land
Death rates are starting to drop due to the advancement of medice and medical care.There was also improved sanitation and clean running water.
What happens in the third stage of the DTM
Description–Death rates is still falling but at a slower rate and birth rates are starting to drop but its still natural increase eg.Brazil
Explanation–
Birth rates are dropping as families have access to contraception and women are not having children until their early 30’s as to pursue their education or carer resulting in fertility declines with age for women.
What happens in the fourth stage of the DTM
Description–Birth & Death rates are both low Ireland and UK are at this stage
What happens in the fifth stage of the DTM
Death rates stays steady but birth rates falls creating naturla decrease eg.Japan
Migration
the permanent or semi-permanent movement of people from one place of residence to another
International Migration
Movement between countries eg Northern Ireland to USA
Internal Migration
Movement within a country eg England to Scotland
Emigration
Outwards movement of people from one country to another eg emigrate from Northern Ireland
