geography test - theme 1 Flashcards
define overpopulation
when the number of people is greater than the amount of resources and technology to maintain an adequate standard of living for the population
define underpopulation
when the number of people living in an area is less than is needed to make a full use of the resources available
some consequences of overpopulation are
- not enough housing
- water and air pollution
- shortage of food and water
- high crime rates
- not enough health care and education
- lack of employment
- poverty
some consequences of underpopulation are
- shortage of workers
- low levels of production
- high taxes
- resources underused
- lack of government income
- small markets for goods and services
- low value of exports
define natural population
natural population is the change between the birth rates and death rates
define birthrate
birthrates are the number of births per 1000 people per year
define deathrates
deathrates are the number of deaths per 1000 people per year
define net migration
the average number of people moving into the country minus those moving out of the country
what is a demographic transition model
the model of the way that population growth can be divided into four stages as birth and death rates change over time
falling birthrates are caused by
- availability for contraception
- more women are busy to go to work
- girls are educated to marry later
- more family planning
- reduction of infant mortality
- less need for children as a labour source
falling death rates are caused by
- improvement in healthcare facilities
- increased availability of medicines and doctors
- more and better quality food available
- improvement in water supplies
- improvement in sanitation and hygiene
- reduction in wars and conflicts
define migrants
migrants are people who move from one place to another in order to live or work.
define imigrants
people moving into a country
define emigrant
people moving out of the country
define asylum seeker
a person who leaves their country of origin in fear of persecution, they have asked for permission to stay in another country, and are waiting a decision on this
define refugee
a person who leaves their country of origin in fear of their lives. they often do not know where they will end up and with no permission to stay in another country