AP Human Geography Units 1 and 2: Geographic Thinking and Inquiry

Geographic Thinking and Human Geography

  • The Power of Geography

    • Geography is an integrative discipline connecting the physical and human dimensions of the world.
    • It studies processes on Earth’s surface, relationships between people and environments, and connections between people and places.
    • Physical Geography: The study of natural processes/features (landforms, climate, plants).
    • Human Geography: The study of events and processes shaping how humans understand, use, and alter the Earth.

  • Geographic Perspectives

    • Spatial Perspective: Concerns where something occurs and why it is located there. It mirrors history’s concern with time.
    • Ecological Perspective: Concerns the relationships and interdependence between living things and their environments.
    • Key Questions: Where? Why there? Why care?

  • Major Spatial Concepts

    • Location:
      • Absolute Location: Exact position using coordinates (latitude/longitude).
      • Relative Location: Description of a place in relation to other features/places.
    • Place:
      • Distinguished by physical and human characteristics.
      • Sense of Place: Emotional attachment/identity tied to a location.
      • Site: Absolute location and physical traits (climate, soil).
      • Situation: Location relative to other places and its external connections (trade routes, political ties).
    • Space, Pattern, and Flow:
      • Space: The area between things.
      • Density: Number of things in a specific area.
      • Pattern: How things are arranged (geometric or random).
      • Flow: The movement of people, goods, and information across space.

  • Human-Environment Interaction Theories

    • Environmental Determinism: (Historically discredited) Argues that the physical environment (climate/soil) dictates human behavior and societal development. Criticized for Eurocentric biases.
    • Possibilism: Argues that humans have agency. The environment offers opportunities/challenges, but humans decide how to react based on technology and ingenuity.

  • Scale and Region

    • Scale of Analysis: Refers to the area being studied (global, national, regional, local). Analysis at one scale can reveal details obscured at another (e.g., national food insecurity vs. local county-level hunger).
    • Region: A human construct identifying areas with cohesive characteristics.
      • Formal (Uniform) Region: Areas with one or more shared traits (e.g., states with boundaries, climate zones like the Pampas).
      • Functional (Nodal) Region: Organized around a focal point or node (e.g., a city’s media market, airline hubs, public transit systems).
      • Perceptual (Vernacular) Region: Defined by feelings, attitudes, and subjective understanding (e.g., "The Midwest"). Boundaries are often contested.

Globalization and Wallerstein’s World System Theory

  • Globalization

    • The expansion of economic, cultural, and political processes on a worldwide scale.
    • Powered by advances in transportation, communication (the internet/social media), and government policies (e.g., free trade agreements like USMCA or the EU).
    • Time-Space Compression: The shrinking of relative distance between places due to technology.
    • Distance Decay: The principle that interaction decreases as distance increases. Tobias Tobler’s First Law of Geography states all things are related, but near things are more related than far things.

  • Wallerstein’s World System Theory

    • Developed by Immanuel Wallerstein to explain uneven economic development.
    • Three-Tier Hierarchy:
      • Core: Wealthy, high education, advanced tech, strong governments. They control the global market.
      • Periphery: Lower wealth, high poverty, unstable governments. Exploited for cheap labor and natural resources.
      • Semi-periphery: Mix of core and periphery processes. In the process of industrializing; export goods but remain subordinate to the core.

  • Sustainability

    • The use of land/resources to ensure their future availability.
    • Renewable Resources: Nature produces them faster than humans consume them (solar, wind).
    • Nonrenewable Resources: Humans consume them faster than nature produces them (fossil fuels).
    • Sustainable Development: Development meeting current needs without compromising future generations.

Geographic Inquiry, Data, and Tools

  • The Geo-Inquiry Process

    • Ask: Develop an open-ended question about a spatial problem.
    • Collect: Gather geographic information (interviews, maps, fieldwork).
    • Visualize: Organize data into maps and graphics to find patterns.
    • Create: Develop a story or message based on the data.
    • Act: Share with decision-makers to implement change.

  • Types of Data

    • Quantitative Data: Information measured by numbers (e.g., population counts, GNI).
    • Qualitative Data: Interpretations like field observations, media reports, or personal interviews.
    • Census: An official count of a population in a defined area (conducted every 10 years in the U.S.).

  • Geospatial Technologies

    • Geographic Information Systems (GIS): Captures, stores, and displays data in thematic layers (e.g., traffic layers over building layers).
    • Remote Sensing: Gathering data without physical contact via satellites or drones. Used for tracking environmental change or disaster responses (e.g., Hurricane Maria).
    • Global Positioning System (GPS): A network of 31+ satellites used to pinpoint exact locations for navigation.

Map Projections and Types

  • Map Distortion

    • Since Earth is a 3D sphere, flattening it to 2D causes distortion in shape, area, distance, or direction.
    • Map Projections:
      • Mercator: Preserves direction (good for navigation) but heavily distorts the size of landmasses near the poles.
      • Gall-Peters: Equal-area projection that shows relative size accurately but distorts shapes (elongated continents).
      • Robinson: Compromise projection that "looks real" but distorts everything slightly (useful for general maps).
      • Azimuthal: Round projection centered on one point, often used for Arctic/Antarctic regions.

  • Map Types

    • Reference Maps: Focus on location and identification (political boundaries, physical landforms).
    • Thematic Maps: Focus on a specific theme or relationship.
      • Choropleth: Uses color/shading to represent categories of data in preset areas.
      • Isoline: Connects data points of equal value (e.g., temperature contours).
      • Graduated Symbol: Uses symbols of different sizes to show quantitative differences.
      • Dot Map: Uses dots to show specific observations or density.
      • Cartogram: Distorts geography to show a variable's size relative to space (e.g., a map where the US is larger than Canada based on population).