Human Geography Chapter 2: Population Study Guide

Vocabulary practice flashcards generated from AP Human Geography Chapter 2 lecture notes covering demographic metrics, transition models, theories, density measures, and population policy concepts.

Ecumene

The portion of Earth's surface permanently inhabited by humans, such as coastal plains and fertile valleys.

Crude Birth Rate (CBR)

The total number of live births in a year for every 1,000 people in a population.

Crude Death Rate (CDR)

The total number of deaths in a year for every 1,000 people in a population.

Natural Increase Rate (NIR)

The percentage by which a population grows in a year, calculated as the Crude Birth Rate minus the Crude Death Rate.

Carrying Capacity

The maximum number of people an area or environment can sustainably support with its available resources, such as food, water, and land.

Global Scale Carrying Capacity

Earth's overall capacity to support the human population depending on worldwide food production, resource distribution, and technological advancements.

Local Scale Carrying Capacity

A specific region or environment's ability to support its population based on local resources like freshwater, arable land, and infrastructure.

Infant Mortality Rate (IMR)

The annual number of deaths of infants under age 1 per 1,000 live births.

J-Curve Growth

A pattern where population starts growing slowly and then rapidly accelerates upward, representing exponential growth.

S-Curve Growth

A pattern where rapid population growth eventually slows down and stabilizes near the carrying capacity, representing logistic growth.

Life Expectancy at Birth (LEB)

The average number of years a newborn infant can expect to live.

Total Fertility Rate (TFR)

The average number of children a woman will have during her childbearing years.

Arithmetic Density

The total number of people divided by the total land area, measuring overall population concentration.

Physiological Density

The total number of people divided by the amount of arable (farmable) land, measuring pressure on food-producing land.

Agricultural Density

The number of farmers divided by the amount of arable land, measuring agricultural efficiency (lower values indicate high technology and mechanization).

Doubling Time

The time required for a population to double in size at its current growth rate, calculated using the Rule of 70 as $\frac{70}{\text{NIR}}$.

Dependency Ratio

The ratio of dependents (people under age 15 and over age 65) to the working-age population.

Youth Dependency

A high proportion of dependents under age 15 in Stage 2 developing nations, causing financial strain on education and childcare and triggering future population booms.

Elder Dependency

A high proportion of dependents over age 65 in Stage 4 and 5 developed nations, creating tax and financial burdens on working citizens to support pensions and healthcare.

Overpopulation (Population Explosion)

Occurs when a rapidly growing population threatens to exceed the carrying capacity of its environment.

Underpopulation (Population Implosion)

Occurs when birth rates drop below death rates and TFR falls below the replacement level of $2.1$, causing total population to shrink.

Demographics

Statistical data used to describe characteristics of a human population, such as age, gender, birth rates, and death rates.

Demographic Transition Model (DTM)

A 5-stage model illustrating changes in Crude Birth Rate, Crude Death Rate, and Natural Increase Rate as a country develops.

DTM Stage 1

Stage characterized by high birth rates, high death rates, and low NIR, driven by hunting and gathering, food shortages, and disease.

DTM Stage 2

Stage characterized by high birth rates, rapidly declining death rates, and high NIR (population explosion), seen in LDCs like Guatemala, Afghanistan, Bangladesh, and Nigeria.

DTM Stage 3

Stage characterized by dropping birth rates, dropping death rates, and a stable NIR, driven by urbanization and female education in nations like India, Brazil, Mexico, and Turkey.

DTM Stage 4

Stage characterized by low birth rates, low death rates, and low/zero population growth (ZPG), with high female workforce participation, seen in the UK, USA, France, and Canada.

DTM Stage 5

Stage characterized by low birth rates dropping below high death rates (implosion), causing population decline and high elder dependency, seen in South Korea, Japan, Italy, Russia, China, Poland, and Ukraine.

Epidemiologic Transition Model Stage 1: Pestilence & Famine

Stage with high mortality caused primarily by infectious and parasitic diseases, animal attacks, food shortages, and widespread pandemics.

Epidemiologic Transition Model Stage 2: Receding Pandemics

Stage where death rates drop rapidly due to improvements in medicine, sanitation, and food supply, though diseases like cholera, TB, and malaria remain present.

Epidemiologic Transition Model Stage 3: Degenerative Diseases

Stage where people live longer and die primarily from chronic human conditions such as heart disease and cancer.

Epidemiologic Transition Model Stage 4: Delayed Degenerative Diseases

Stage where advanced medical treatments delay chronic illnesses, further extending life expectancy.

Epidemiologic Transition Model Stage 5: Re-emerging Infectious Diseases

Stage characterized by the return of infectious diseases caused by drug-resistant superbugs, poverty, and high global connectivity (e.g., AIDS/HIV, COVID, Ebola).

Population Pyramid

A bar graph showing human population distribution divided by age cohort and gender.

Thomas Malthus's Theory

The theory predicting population grows exponentially while food supply grows arithmetically, leading to inevitable starvation and resource depletion.

Ester Boserup's Theory

The theory countering Malthus by proposing that population growth drives agricultural innovation and technology, raising Earth's carrying capacity.

Neo-Malthusians

Modern theorists who argue Malthusian concerns apply to non-renewable resources like clean water, energy, and overall environmental limits.

Major Global Population Clusters

The four primary population concentrations: East Asia, South Asia, Southeast Asia, and Europe.

Agricultural Revolution

Occurred 10,000 years ago, shifting human societies from hunting and gathering to farming, creating permanent settlements and stable food supplies.

Industrial Revolution

Occurred 200 years ago, bringing technology, urbanization, and food surpluses, plummeting death rates and pushing Western countries into DTM Stage 2.

Medical Revolution

Occurred 50-100 years ago, diffusing modern medicine and vaccines to LDCs in Africa, Asia, and Latin America, lowering IMR and causing rapid 20th-century population growth.

Pro-Natalist Policies

Government programs designed to encourage births and increase population growth through incentives such as paid parental leave and tax credits (e.g., France).

Anti-Natalist Policies

Government programs designed to reduce fertility rates and slow population growth (e.g., China's former One-Child Policy and India's family planning programs).

Eugenics

Historically tied to selective population control and extreme policies (such as in Nazi Germany) to artificially control population genetics and growth.

Population Growth Curves: J-Curve & S-Curve Diagram

Graphs demonstrating Exponential Growth (J-curve) alongside Logistic Growth (S-curve) approaching carrying capacity $K$.

Demographic Transition Model Chart

A visual graph displaying the rates of Births/Deaths per 1000 and Total Population trends over the 5 stages of demographic transition.

Three Patterns of Population Change Diagram

Population pyramids illustrating Rapid Growth (wide base, e.g., Kenya), Slow Growth (narrowing base, e.g., United States), and Negative Growth (top-heavy, e.g., Germany).

Variations in Country Population Pyramids

Pyramid structures depicting diverse age-sex demographics across nations like Afghanistan, Argentina, Congo, Monaco, Montserrat, Norway, Rwanda, South Korea, and UAE.