Population Flashcards
(44 cards)
Dependency ratio formula
(Population 0-19) + (population over 60)
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Population 20-59
Juvenility index
Population 0-19
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Population 20&Over
Old-age index
Population 60 and over
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Population 20-59
Briefly describe the trend of world population change over the last 200 years.
Since 1800 increased by 6-fold.
1.1 billion to 6.1 billion
Will this trend continue to 2050?
Yes - 9 billion by 2050
How do countries collect data about their populations?
In the form of a census
List three types of information typically collected
Employment characteristics, ethnicity and educational attainment
What are the potential problems of census data collection?
Infringement of privacy
Some forms aren’t returned
Political conditions of certain countries make it difficult to complete
How to governments make use of the resulting population data?
To provide a basis for the allocation of resources to services
Measure population change and who’s in what area
Gives a snapshot of diversity
How might businesses and other forms of commerce make use of the resulting population data?
Enables targeted marketing (e.g. Putting more prepared foods in areas where there are a greater number of single adults)
Insurance industry can assess risk more easily
Define birth rate
Measures an areas fertility.
Number of live births per 1,000 people in one year
Define death rate
Number of deaths per 1,000 people in one year
How to BR and DR combine to determine natural pop. change?
If birth rate exceeds the death rate, population will increase. And vice versa!
What is the net migration rate?
The difference between the numbers of in-migrants and out-migrants
Define fertility rate?
Number of live births per 1,000 women aged 15-49 in 1 year.
What fertility rate is required to maintain a steady population growth?
- 1
2. 12
Define infant mortality rate
Number of deaths of children under age of 1 per 1,000 live births per year.
Define life expectancy
The length of time someone is expected to live for.
Define population density
The number of people who live in an area.
Divide the total population by total area of the region.
Example of countries with high birth rate
Mali and Yemen
Example of counties with low birth rate
Bulgaria and U.K.
Why might countries with high death rates or high infant mortality rates also have high birth rates?
A study of sub-Saharan Africa concluded women must have, on average, 8/9 children to be 95% certain of a surviving adult son.
How might local tradition affect fertility?
In many parts of the world, tradition demands high rate of rep production. Intense cultural expectations may override the wishes of a women.
Does adherence to religious doctrine act to increase of decrease fertility? Why?
Increase fertility. Islam and Roman Catholic Church oppose artificial birth control.
However, example such as Italy have shown this isn’t always adhered to.