AP Human Geography Unit 2

Demographic Transition Model (DTM)

illustrates the shift in a country's population dynamics as it progresses from pre-industrial to post-industrial stages, characterized by changes in birth and death rates.

Arithmetic Population Density

he total number of people divided by the total area of a place

Physiological Population Density

the number of people per unit area of arable land

Dependency Ratio

The number of people too young or too old to work compared to working-age people.

Crude Birth Rate (CBR)

Number of births per 1,000 people per year.

Crude Death Rate (CDR)

Number of deaths per 1,000 people per year.

Total Fertility Rate (TFR)

Average number of children a woman will have in her lifetime.

Push Factors

Reasons people leave a place (e.g., war, lack of jobs).

Intervening Obstacle

A barrier that stops or slows migration (e.g., mountains, laws).

Intervening Opportunity

A better option found along the migration path.

Chain Migration

When people follow others (like family) to a new place.