Population Flashcards
What is an ageing population?
Population in which the proportion of people over 65 is increasing.
What is birth rate?
The number of live births per thousand population per year, expressed as births per 1000.
What is a census?
An official registration of the number of the people, and valuation of their estate, for the purpose of imposing taxes, and other general statistics of a country, usually made every 10 years.
What is a contractive pyramid?
A population pyramid with a relatively narrow base showing a recently declining birth rate. (Stage 3 DTM)
What is death rate?
The number of deaths per 1000 population per year, expressed as deaths per 1000.
What is the Demographic transition?
The changing relationship over time of the birth and death rates from both high to both low. Illustrated by the demographic transition model.
What is population density?
The number of people per square kilometer
What is the dependency ratio?
Shows how many young people aged less than 15 and older people over 65 depend on people of working age. It is worked out by the % of people aged younger than 15 plus the % over 65, divided by the % aged 15-64.
Countries with a high dependency ratio have less working age people and more people that need looking after.
what is population distribution?
The way in which people are spread or dispersed across an area.
What is total fertility rate?
The average number of children born to a woman in her life time.
What is infant mortality rate?
A measure of the number of infants dying under 1 year of age, usually expressed as a number of deaths per 1000 live births, per year.
What is fertility rate?
The number of children born to 1000 women of child bearing age.
What is crude birth rate?
the number of births in a given year divided by the population and multiplied by 1000.
What is natural change?
The change in the size of a population caused by the interrelationship between birth and death rates. If the birth rate exceeds the death rate then the population will increase. If the death rate exceeds the birth rate then the population will decrease.
What is life expectancy?
The average number of years a person from a specific country is expected to live.
How do you calculate population change?
Birthrate+- death rate +- migration
How does health affect a country’s population?
- High standard of healthcare in a country lowers infant mortality and birth rate as people don’t need to have as many children.
- Better healthcare as well as healthy diets etc means people live longer and death rate is lowered.
- Access to drugs to relieve people of diseases.
How does education affect a country’s population?
- Emancipation of women reduces birth rate as women get careers instead of staying home and raising children
- Compulsory education ensures people are educated about hygiene, contraception STDs, etc. So death rate and birth rates will be lowered.
- High standards of education in the long term can lead to medical advancements and better trained doctors.
How do social provisions affect a country’s population?
- Good social care provided to elderly increases life expectancy and reduces death rate.
- Availability of clean water means water bourne diseases are less prevalent.
- Media makes it easier to educate people and raise awareness about things such as outbreaks of disease.
How do cultural factors affect a country’s population?
- Some cultures + religions condemn contraception and encourage large families (catholics) increasing birth rate.
- In some countries, use of contraception, abortion etc. is banned leading to a higher birth rate as well as death rate due to spread of STIs.
- Some cultures say that women’s only role is to stay at home and raise children, leading to an increased birth rate.
How do political factors affect a country’s population?
- some countries have pro-natalist policies and provide benefits to people who have children and encourage more children as a result of a natural decrease and ageing population, (France)
- Conversely, some countries have anti-natalist policies as they see large population growth as a threat (Malthus). Such as in China where people have to pay fines for the second or more children.
- High taxation may mean people cannot afford to raise children. Young people may migrate leaving an ageing population
- War significantly reduces birthrate as people are occupied with fighting but after wars there are often ‘baby booms’
How do environmental factors affect a country’s population?
- Countries with frequent natural disasters will have a high death rate, as well as high outmigration of people fearing for their life, lowering their population
- In countries with heavy industry, air and water pollution can increase the death rate and infant mortality rate so people have more children.
- Very hot or very cold countries will have increased death rates due to spread of disease in the warm or effects of the cold.
What does population distribution describe?
The way people are spread out across the Earth.
What does population density describe?
The number of people living in a given area, calculated by number of people in an area / size of the area