Unit 2 and 3 AP HUGE

Arithmetic Density

The average density of the total population over the total land area

Physiological Density

The farmland density which is measure by the total population over the amount of arable land ara

Agricultural Density

The farmer density which is the total number of of farmers over the total amount of arable land

Carrying Capacity

The number of people that can be supported in an area given the technology of production

Population Pyramid

Shows the percentage of the total population in fiver-year age groups, with the youngest at the base aunt he oldest at the top

Demographic

The chartereristics of a population that describe its dynamic and structure

Migration

A permanent move to a new location

NIR

percentage by which a population grows in a year

Population doubling time

The time is takes to double populations in size, dna be calculated using rule 70

DTM

Model consisting of 4 stages that helps to explain the siring and falling of natural increase overtime in countries

Epidemiological transition

Branch of medical science covered with the incidents, distractions and control of diseases that are prevalent among a community

Malthusian Theron

Population is growing faster than the increase of food supply

Pronatlist Policies

Encourage births to increase population

Anti-Natalist policies

Reduce population growth by discourage births

Ravensteins law of migration

For the distance that migrants typically move a short distance and are typically male

CBR

The number of births in a country over 1000

CDR

The number of deaths in a country over 1000

Life expectancy

The average period that a person is expected to live

Dependency Ratio

People that are unemployed divided by the people in the workforce

Push Factors

The force that induces people to move out of a location

Pull factors

The forces that brings people in a location

Intervening Opportunties

A features usually economics, that causes a migrant to choose a destination other than his original one

Intervening obstacles

Obstacles that percent migrants form reaching their location

Forced migration

Migrant that has to leave their country for safety or a new start

Refugees

Displaced person that crossed international borders

Internally displaces person IDP

A refugee that doesn’t cross borders and stays in the country

Asylum seekers

Someone who went to another country and hopes to be recongnized as a refugee ny the government

Voluntary Migration

A decision to migrate

Internal Migration

Permanent move within a country

Chain migration

When people migrate they tend to move near family and friends from their home country

Step Migration

Series of step as migrant takes before they reach their destination

Guest Worker

someone who was allowed immigrate temporarily for work via circular migration

Stage 1

Birth rate very high and Death rate very high : NIR is zero. High diseases, lack of water and lack of health care

Stage 2

High birth rates but death rates declining; NIR increases sharply. Improvements of food supply, better medical understanding

Stage 3

Birth rates decline and death rates decline a little; cites more urban, less rural, more job opportunities, medicine better

Stage 4

Birth rate and death rates are very low; NIR is very low. More developed countries

Stage 5

Negative NIR; low CBR and increasing CDR few young women in child bearing years less workers

Remittance

The transfer of money by workers to people in the country from which the emigrated

Transhumance

Seasonal migration usually with farmers livestock because they move their livestock between winter and summer

Transnational Migration

A type of migration that regularly moves from one country to another for work and or please

Quotas

Maximum limits on their number of people who could immigrate to the U.S from a country in 1 year

Brain Drain

A term for the disproportionate amount of highly skilled and inteligente citizens migration away from from sending countries

Distance Decay

The further 2 places are the less likely it is that people will migrate

Gravity Model

There is a grater pull to larger communities and people are more likely to migrate from a large community than a small one