WGU D199: INTRODUCTION TO
PHYSICAL AND HUMAN GEOGRAPHY –
2026/2027 ULTIMATE STUDY GUIDE &
PRACTICE ASSESSMENT
SECTION 1: CONCISE COURSE SUMMARY
Part A: Physical Geography
Earth Systems & Geomorphology
● Earth’s Structure: Composed of the inner core (solid iron), outer core (liquid
iron/nickel), mantle (semi-solid rock), and crust (thin, solid outer layer).
● Plate Tectonics: Earth’s lithosphere is divided into tectonic plates that move due to
mantle convection. Boundaries include divergent (plates move apart, creating
mid-ocean ridges), convergent (plates collide, forming mountains or subduction
zones), and transform (plates slide past each other, causing earthquakes).
● Landforms: Mountains (e.g., Himalayas from continental collision), valleys (formed
by rivers or glaciers), plains (flat areas from sediment deposition).
● Weathering & Erosion: Weathering breaks down rock (mechanical or chemical);
erosion transports material via water, wind, or ice, shaping landscapes over time.
Atmosphere & Climate
● Weather vs. Climate: Weather = short-term atmospheric conditions; Climate =
long-term patterns (30+ years).
● Köppen Climate Classification: Five main types: Tropical (A), Dry (B), Temperate
(C), Continental (D), Polar (E), plus highland (H). Examples: Af = tropical rainforest,
BWh = hot desert.
● Atmospheric Circulation: Driven by solar heating and Earth’s rotation. Includes
Hadley, Ferrel, and Polar cells. The Coriolis effect deflects wind right in the Northern
Hemisphere and left in the Southern Hemisphere, influencing global wind belts (trade
winds, westerlies).
● Severe Weather: Hurricanes (tropical cyclones fueled by warm ocean water),
tornadoes (from supercell thunderstorms), and droughts (prolonged precipitation
deficits).
Biosphere & Ecosystems
● Biomes: Large ecological regions with distinct climate, flora, and fauna:
, ○ Tundra: Arctic/alpine, permafrost, short growing season.
○ Rainforest: High rainfall, biodiversity hotspots (Amazon, Congo).
○ Desert: <500 mm annual precipitation, specialized adaptations.
○ Grassland: Savannas (tropical, seasonal rain) and prairies (temperate, fertile
soils).
● Biodiversity: Highest in tropical regions; threatened by habitat loss, climate change,
and invasive species.
● Human-Environment Interaction: Deforestation, agriculture, and urbanization alter
ecosystems; conservation and sustainable practices aim to mitigate damage.
Hydrosphere
● Global Water Distribution: 97% saline (oceans), 2% locked in ice, <1% freshwater
(lakes, rivers, groundwater).
● River Systems: Drainage basins collect water; rivers transport sediment and shape
valleys via erosion and deposition (deltas, floodplains).
● Groundwater: Water stored in aquifers; over-extraction leads to depletion and land
subsidence.
● Ocean Currents: Driven by wind, temperature, and salinity (thermohaline
circulation). Influence climate (e.g., Gulf Stream warms NW Europe).
Part B: Human Geography
Population & Migration
● Demographic Transition Model (DTM): Four/five stages showing shift from high
birth/death rates to low rates as societies industrialize (Stage 1: high/high; Stage 2:
high birth, falling death; Stage 3: falling birth, low death; Stage 4: low/low; Stage 5:
death > birth).
● Population Pyramids: Graphical representation of age-sex structure; shape
indicates growth (pyramid = rapid growth; column = stable; urn = decline).
● Push/Pull Factors: Push = negative conditions (war, poverty); Pull = positive
attractions (jobs, safety). Types: economic, political, environmental, social.
● Migration Patterns: Internal (rural-to-urban), international (e.g., Syrian refugees),
and chain migration (networks facilitate movement).
Cultural Geography
● Language & Religion: Language families (Indo-European, Sino-Tibetan);
universalizing religions (Christianity, Islam) vs. ethnic religions (Hinduism, Judaism).
● Ethnicity: Shared cultural identity (language, ancestry); differs from race (social
construct based on physical traits).
● Folk vs. Popular Culture: Folk = traditional, local, slow diffusion; Popular =
mass-produced, global, rapid diffusion via media.
● Cultural Landscapes: Human-modified environments reflecting cultural values (e.g.,
mosques, barn styles, street grids).
Political Geography
, ● Nation vs. State: Nation = cultural group; State = sovereign political territory;
Nation-state = alignment of both (e.g., Japan).
● Sovereignty & Borders: Sovereignty = authority over territory; Borders may be
geometric (straight lines) or physical (rivers/mountains). Disputes arise over
resources or identity.
● Geopolitical Theories: Mackinder’s Heartland Theory, Spykman’s Rimland
Theory—emphasize strategic control of Eurasia.
● Globalization: Increased interconnectedness; challenges state sovereignty via
supranational organizations (EU, UN) and transnational corporations.
Economic Geography
● Economic Sectors: Primary (extraction: farming, mining), Secondary
(manufacturing), Tertiary (services), Quaternary (knowledge: R&D, IT).
● Development Indicators: GDP per capita (economic output), HDI (health,
education, income). Core-periphery model explains global inequality.
● Globalization & Trade: Global supply chains; trade blocs (NAFTA/USMCA, EU);
dependency theory critiques unequal exchange.
Urban Geography
● Urbanization: Increasing population in cities; highest in developing regions
(Africa/Asia). Megacities = >10 million people.
● Urban Models:
○ Burgess Concentric Zone: Rings from CBD outward (zone of transition,
working-class, residential, commuter).
○ Hoyt Sector Model: Growth along transport corridors (sectors of high/low
income).
○ Harris & Ullman: Multiple nuclei (shopping centers, airports) drive growth.
● Urban Challenges: Sprawl, pollution, inequality, inadequate infrastructure, informal
settlements (slums).
SECTION 2: COMPREHENSIVE PRACTICE TEST
1. Which of the following best explains the formation of the Himalayas?
A) Divergent plate boundary causing seafloor spreading
B) Transform boundary resulting in horizontal displacement
C) Convergent boundary between two continental plates
D) Hotspot activity creating a volcanic mountain chain
Answer: C
PHYSICAL AND HUMAN GEOGRAPHY –
2026/2027 ULTIMATE STUDY GUIDE &
PRACTICE ASSESSMENT
SECTION 1: CONCISE COURSE SUMMARY
Part A: Physical Geography
Earth Systems & Geomorphology
● Earth’s Structure: Composed of the inner core (solid iron), outer core (liquid
iron/nickel), mantle (semi-solid rock), and crust (thin, solid outer layer).
● Plate Tectonics: Earth’s lithosphere is divided into tectonic plates that move due to
mantle convection. Boundaries include divergent (plates move apart, creating
mid-ocean ridges), convergent (plates collide, forming mountains or subduction
zones), and transform (plates slide past each other, causing earthquakes).
● Landforms: Mountains (e.g., Himalayas from continental collision), valleys (formed
by rivers or glaciers), plains (flat areas from sediment deposition).
● Weathering & Erosion: Weathering breaks down rock (mechanical or chemical);
erosion transports material via water, wind, or ice, shaping landscapes over time.
Atmosphere & Climate
● Weather vs. Climate: Weather = short-term atmospheric conditions; Climate =
long-term patterns (30+ years).
● Köppen Climate Classification: Five main types: Tropical (A), Dry (B), Temperate
(C), Continental (D), Polar (E), plus highland (H). Examples: Af = tropical rainforest,
BWh = hot desert.
● Atmospheric Circulation: Driven by solar heating and Earth’s rotation. Includes
Hadley, Ferrel, and Polar cells. The Coriolis effect deflects wind right in the Northern
Hemisphere and left in the Southern Hemisphere, influencing global wind belts (trade
winds, westerlies).
● Severe Weather: Hurricanes (tropical cyclones fueled by warm ocean water),
tornadoes (from supercell thunderstorms), and droughts (prolonged precipitation
deficits).
Biosphere & Ecosystems
● Biomes: Large ecological regions with distinct climate, flora, and fauna:
, ○ Tundra: Arctic/alpine, permafrost, short growing season.
○ Rainforest: High rainfall, biodiversity hotspots (Amazon, Congo).
○ Desert: <500 mm annual precipitation, specialized adaptations.
○ Grassland: Savannas (tropical, seasonal rain) and prairies (temperate, fertile
soils).
● Biodiversity: Highest in tropical regions; threatened by habitat loss, climate change,
and invasive species.
● Human-Environment Interaction: Deforestation, agriculture, and urbanization alter
ecosystems; conservation and sustainable practices aim to mitigate damage.
Hydrosphere
● Global Water Distribution: 97% saline (oceans), 2% locked in ice, <1% freshwater
(lakes, rivers, groundwater).
● River Systems: Drainage basins collect water; rivers transport sediment and shape
valleys via erosion and deposition (deltas, floodplains).
● Groundwater: Water stored in aquifers; over-extraction leads to depletion and land
subsidence.
● Ocean Currents: Driven by wind, temperature, and salinity (thermohaline
circulation). Influence climate (e.g., Gulf Stream warms NW Europe).
Part B: Human Geography
Population & Migration
● Demographic Transition Model (DTM): Four/five stages showing shift from high
birth/death rates to low rates as societies industrialize (Stage 1: high/high; Stage 2:
high birth, falling death; Stage 3: falling birth, low death; Stage 4: low/low; Stage 5:
death > birth).
● Population Pyramids: Graphical representation of age-sex structure; shape
indicates growth (pyramid = rapid growth; column = stable; urn = decline).
● Push/Pull Factors: Push = negative conditions (war, poverty); Pull = positive
attractions (jobs, safety). Types: economic, political, environmental, social.
● Migration Patterns: Internal (rural-to-urban), international (e.g., Syrian refugees),
and chain migration (networks facilitate movement).
Cultural Geography
● Language & Religion: Language families (Indo-European, Sino-Tibetan);
universalizing religions (Christianity, Islam) vs. ethnic religions (Hinduism, Judaism).
● Ethnicity: Shared cultural identity (language, ancestry); differs from race (social
construct based on physical traits).
● Folk vs. Popular Culture: Folk = traditional, local, slow diffusion; Popular =
mass-produced, global, rapid diffusion via media.
● Cultural Landscapes: Human-modified environments reflecting cultural values (e.g.,
mosques, barn styles, street grids).
Political Geography
, ● Nation vs. State: Nation = cultural group; State = sovereign political territory;
Nation-state = alignment of both (e.g., Japan).
● Sovereignty & Borders: Sovereignty = authority over territory; Borders may be
geometric (straight lines) or physical (rivers/mountains). Disputes arise over
resources or identity.
● Geopolitical Theories: Mackinder’s Heartland Theory, Spykman’s Rimland
Theory—emphasize strategic control of Eurasia.
● Globalization: Increased interconnectedness; challenges state sovereignty via
supranational organizations (EU, UN) and transnational corporations.
Economic Geography
● Economic Sectors: Primary (extraction: farming, mining), Secondary
(manufacturing), Tertiary (services), Quaternary (knowledge: R&D, IT).
● Development Indicators: GDP per capita (economic output), HDI (health,
education, income). Core-periphery model explains global inequality.
● Globalization & Trade: Global supply chains; trade blocs (NAFTA/USMCA, EU);
dependency theory critiques unequal exchange.
Urban Geography
● Urbanization: Increasing population in cities; highest in developing regions
(Africa/Asia). Megacities = >10 million people.
● Urban Models:
○ Burgess Concentric Zone: Rings from CBD outward (zone of transition,
working-class, residential, commuter).
○ Hoyt Sector Model: Growth along transport corridors (sectors of high/low
income).
○ Harris & Ullman: Multiple nuclei (shopping centers, airports) drive growth.
● Urban Challenges: Sprawl, pollution, inequality, inadequate infrastructure, informal
settlements (slums).
SECTION 2: COMPREHENSIVE PRACTICE TEST
1. Which of the following best explains the formation of the Himalayas?
A) Divergent plate boundary causing seafloor spreading
B) Transform boundary resulting in horizontal displacement
C) Convergent boundary between two continental plates
D) Hotspot activity creating a volcanic mountain chain
Answer: C
