UNIT 3

Age Distribution

the distributions of age in a population

Carrying Capacity

the largest number of people that the environment of a particular area can support

Cohort

a population group that's distinguished by a certain characteristic

Growth Equation

equation that summarizes the amount of growth or decline in a population during a certain period of time, also taking into account net migration and natural increase

Demographic Transition Model

sequence of demographic changes in which a country mover from a high CDR and a high CBR, to having a low CDR and a low CBR

Dependency Ratio

ratio of the economically dependent part of the population to the productive part

Doubling Time

time it takes for a country to double its population

Ecumene

Permanently inhabited land

Infant Mortality Rate

however many infants die per thousand per year

J-curve

This graph

Mortality

How many people die per thousand, CDR

Natality

birth rate, or CBR

Population Densities

measurements of number of people per a unit of land area

Population Projection

the estimated population in a certain time in the future

Population Pyramid

a diagram that displays the population distributions between age and sex

Natural Increase Rate (NIR)

difference of CDR and CBR in a given country in a year

S-curve

This graph

Sustainability

how well an area can supply its residents with the proper needs

Zero Population Growth

CDR and the CBR of a country even out

Chain Migration

people follow others of preceding friends or family I their migratory paths

Distance Decay

the interaction of places decreases as the distance increases

Intervening Obstacle

an issue or challenge that arises or occurs before the reaching of the destination

Migration Patterns

patterns of movement; Intercontinental- over countries' borders, Interregional- within a region or certain area, Rural-Urban- from a rural area to an urban area (farm to a city)

Immigrant

Someone who moves into an area

Emigrant

Someone who moves out of an area

Push-Pull Factor

a reason why a migrant might leave or move to a place

Refugee

a person who has a fear of being caught in means of race, religion, ethnicity, group, or political views

Agricultural Density

Number of farmers divided by arable land

Arithmetic Density

People divided by land area

Physiological Density

People divided by arable land

CBR

(Births divided by population) X1000

CDR

(Deaths divided by population) X1000

Net Migration

Immigrants - Emigrants

Brain Drain

The educated people migrate away

Nyan Cat

This