Unit 2

• Arithmetic Density- the total number of people divided by the total land area
• Physiological Density- the number of people per unit area of arable land, which is land suitable for agriculture
• Agrigultural Density- the ratio of the number of farmers to the total amount ofland suitable for agriculture
• Malthusian theory- a theory of population growth proposed the idea that exponential increases in the population growth would surpass arithmetic increases in the food supply and lead to widespread famine
• Internally Displaced Person- a person who has been forced to migrate for political reasons but has not crossed an international border
• Demographic transitional model- based on historical population trends of two demographic characteristics- birth rate and death rate
• Natural disasters, political revolutions, civil war, and economic stagnation are all examples of push factors
• Political stability, job opportunities, natural resources, education, and better climate are all examples of pull factors.
• Investing in promoting couples to have children or paid maternity leave are examples of pro-natalist policies
• Imposed sterilization and increased immigration policies are examples of anti-natalist policies
• A geographer would use a population pyramid to provide a clear picture of a population's age-sex composition and identity future trends.
• The movement of livestock from the valleys in the winter to mountains regions in the example is an example of transhumance.
• Crude death rate- the ratio of the number of deaths yearly per 1,000 people in a given population
• Dependency ratio- percentage of people within a population who are either too young or too old to work and must be supported by the labor of working adults
• Total fertility rate- the average number of children born to each woman in a given region during the course of her lifetime
• Internal migration- permanent movement within a particular country
• Intervening opportunities- feature (usually economic) that causes a migrant to choose a destination other than the originally chosen one
• intervening obstacles- an environmental or cultural feature that hinders migration
• demographic- the study of population characteristics
• carrying capacity- the ability of the land to sustain a certain number of people