Human Elective - population Flashcards
What does demography mean
The study of human population. People who study demography are called demographers
What is population distribution
The way in which people are spread out across the world, a country, or region
What is population density
It is used to help measure population distribution of people throughout the world. Total population divided by size of area
What is infant mortality
Deaths before one yr old
What is a natural increase of population
When birth rates exceed dead rates
What is total fertility rate
The average number of births per woman in a particular country
What is population replacement level
Total fertility rate at which a population replaces itself from one generation to the next
Age dependency ratio
The ratio of persons in the ages defined as dependant (under 15 and over 65)
By 2030 X% of the worlds population will live in urban areas
60%
Ireland population density
70 per km squared
Dublin population density
185 people per km squared
Why is population density higher in Dublin
Job opportunities encouraged in migration
Population of Dublin commuter zone
2million
How many counties in Dublin commuter belt
13
Eg Louth, Meath, Kildare, Wicklow
Cheaper houses and commute to work
Industry of their own eg maynooth, drogheda
Places around Dublin also have high density, why
Why low density in west of Ireland
Unfavourable land
Out migration
Highlands, bogs
Average population density of France
119 people per km squared
Highest populated regions in France, why
Seinne valley
Greater Paris
Industry eg fashion
Ports eg channel to London
Mediterranean coast due to tourism
Nice, France population density
More than 500 per km squared
Low density in France
Empty diagonal
Little cities to attract industry
Agricultural land
Out migration
Population density of Brazil
20 per km squared due to vast space the rainforest take up
Factors that effect population growth
Technology Government policy Development of resources Society and culture Income levels
Types of technological improvements
Medical
Water
Agricultural
Examples of medical technology
Vaccines (preventative)
Contraception
Penicillin
Pacemaker
How does contraception and family planning effect population growth
Controls, declines birth rates
Improving standard of living and life expectancy in poorer countries
How do vaccines effect population growth
Prevent disease so decrease death rate
Eg for measles, reduces child mortality rate
Cheap and available widespread
An example of medicine which effects population growth
Penicillin
Antibiotic
Cures bacterial infections