Physical Geography Notes

Plate Tectonics

  • Plate tectonics: Movement of Earth's lithosphere, divided into tectonic plates.
  • Significance: Causes earthquakes, volcanic activity, and mountain formation.
  • Convergent Boundaries:
    • Plates collide.
    • Leads to subduction and mountain building.
  • Divergent Boundaries:
    • Plates move apart.
    • Results in rift valleys and seafloor spreading.
  • Transform Boundaries:
    • Lateral movement of plates.
    • Causes earthquakes.

Greenhouse Effect

  • Greenhouse effect: Warming of Earth's surface due to trapping of heat by greenhouse gases (GHGs).
  • Components:
    • Natural processes.
    • Enhanced effects from anthropogenic GHG emissions.

Latitude and Climate Zones

  • Latitude affects solar intensity.
  • Equator: More direct sunlight, warmer temperatures.
  • Polar Regions: Distinct climate zones due to less direct sunlight.

Orographic Effect

  • Orographic effect: Moist air rises over mountains, cools, and precipitates on the windward side.
  • Leeward side: Rain shadow with dry conditions.

Evidence of Climate Change

  • Rising global temperatures.
  • Increasing sea levels.
  • More frequent extreme weather events.
  • Loss of polar ice.

Bioregions and Biodiversity

  • Bioregions: Areas with similar plant and animal life.
  • Significance: Helps understand ecological patterns and impact of environmental changes.

Water Stress

  • Water stress: Insufficient water to meet population needs.
  • Issues: Sanitation challenges and limited access to clean water.

Renewable vs. Nonrenewable Energy

  • Renewable:
    • Sustainable and replenishable naturally.
    • Examples: wind, solar, hydro.
  • Nonrenewable:
    • Finite and depletable.
    • Examples: fossil fuels.

Kyoto Protocol and Paris Agreement

  • Kyoto Protocol (1997) and Paris Agreement (2015): International treaties to reduce GHG emissions and combat climate change through national commitments and cooperation.

Urban Decentralization

  • Urban decentralization: Movement of populations and businesses from urban centers to suburbs.
  • Impacts: Changes in city structure, transportation patterns, community dynamics.

Agribusiness in Sustainable Agriculture

  • Agribusiness role: Promotes efficient food production, supports local economies.
  • Addresses: Food deserts through improved access to fresh produce.

Gentrification

  • Gentrification: Renovating and improving a neighborhood, increasing property values.
  • Effects: Displacement of lower-income residents, altering community social fabric.

Pressure Systems and Weather

  • Low-pressure systems: Rising warm air, precipitation.
  • High-pressure systems: Sinking cool air, clearer skies.

Novel Ecosystems

  • Novel ecosystems: New environments altered by human activity with native and non-native species.
  • Relevance: Understanding biodiversity and ecological resilience.

Unitary State

  • Unitary state: Centralized power in a single national government.
  • Contrast: Differs from power distributed among regional authorities.

Cultural Homeland

  • Cultural homeland: Geographic area of historic settlement for a cultural group.
  • Characteristics: Shared language, traditions, social practices.

Cultural Assimilation

  • Cultural assimilation: Adopting customs, values, and behaviors of another culture.
  • Effect: Loss of original cultural identity.

Wealthiest World Region Characteristics

  • Highly urbanized population.
  • Postindustrial economy based on services and technology.
  • Cultural diversity and rich natural resources.

Rocky Mountains Significance

  • Major mountain range in North America.
  • Known for: Significant elevation, diverse ecosystems, influencing climate and human settlement patterns.

Environmental Costs of Urbanization

  • Air pollution.
  • Acid rain.
  • Soil erosion.
  • Water issues (due to increased industrial activity and population density).

Climate Change Regional Effects

  • Drier West and wetter East in North America.
  • Rising sea levels.
  • Melting Arctic ice: Opens new shipping routes and resource potential.

Megalopolis

  • Megalopolis: Large urban region formed by merging metropolitan areas.
  • Characteristics: High population density and extensive urban sprawl.

Historic Migration Patterns in North America

  • Westward expansion.
  • African American urban migration.
  • Growth in the Sun Belt.
  • Impact: Shaped demographic distribution and urban development.

Urban Sprawl

  • Urban sprawl: Uncontrolled expansion of urban areas into rural land.
  • Issues: Increased traffic, loss of agricultural land, environmental degradation.

Gentrification in Inner Cities

  • Gentrification: Transformation of urban neighborhoods due to affluent residents.
  • Results: Rising property values and displacement of lower-income residents.

Cultural Patterns in North America

  • Dominant Anglo culture.
  • Pluralism: Ethnic groups maintain cultural identities, contributing to a diverse social landscape.

Urbanization Effects on Rural Areas

  • Depopulation in rural areas.
  • Growth in some rural regions due to edge cities.

Geographical Scope of Latin America

  • Extends from the Rio Grande to Tierra del Fuego.
  • Encompasses Spanish and Portuguese-speaking countries.

Andes Mountains Significance

  • Major geographical feature in Latin America.
  • Features: Tectonic activity, volcanism, Altiplano plateau (influences climate and human activities).

Altitudinal Zonation

  • Different climate and vegetation zones at varying elevations in mountainous regions (e.g., Andes).
  • Affects agriculture and biodiversity.

Environmental Concerns in Latin America

  • Deforestation.
  • Grassification.
  • Urban sprawl.
  • Climate change impacts: Glacier retreat, spread of vector-borne diseases.

Demographic Trends in Latin America

  • High urbanization rates.
  • Smaller family sizes.
  • Population momentum.
  • Influence: Economic and social structures.

Migration Impact on Latin American Economy

  • Migration (European, Asian, internal) impacts the economy through remittances.
  • Remittances: Major income source for many families.

Mestizo Cultural Identity

  • Mixed heritage of European and Amerindian ancestry.
  • Unique cultural identity blending various traditions.

Syncretic Religions in Latin America

  • Combine elements of Catholicism with indigenous and African traditions.
  • Reflect the region's diverse cultural heritage.

Language and Cultural Exports

  • Language: Spanish, Portuguese, Quechua, Mayan.
  • Cultural exports: Telenovelas, soccer, music.
  • Role: Shapes and expresses Latin American identity globally.

Geopolitical Framework of Latin America

  • Iberian colonization: Treaty of Tordesillas.
  • Regional organizations: OAS, UNASUR, Pacific Alliance.
  • Border conflicts: Stemming from colonial divisions.
  • Issues: Drug cartels, violence, and unaccompanied minors migration.

Economic Characteristics of Latin America

  • Neoliberal reforms: Privatization, foreign direct investment (FDI), free trade.
  • Primary export dependency: Agriculture, mining, energy.
  • Significant informal sector.
  • Dollarization: In some economies.
  • Programs: Bolsa Familia (aimed at poverty reduction).

Sub-Saharan Africa: Population and Settlement

  • Fastest population growth globally.
  • High agricultural and physiological densities.
  • Predominantly rural but undergoing rapid urbanization.
  • Settlements concentrated in fertile areas: West Africa and the East African highlands.

Major Health Issues in Sub-Saharan Africa

  • Malaria, HIV/AIDS, and Ebola.
  • Impact: Influenced settlement patterns and foreign aid.
  • HIV/AIDS: 70% of cases in the region, linked to poverty and mobility.

Primary Land Use and Livelihoods in Sub-Saharan Africa

  • Subsistence farming: Predominant, swidden (slash-and-burn) in poor soils.
  • Export agriculture: Focuses on cash crops.
  • Pastoralism: Includes transhumance and nomadic herding.

Cultural and Identity Aspects of Sub-Saharan Africa

  • Lacks a unified language, religion, or political system.
  • Shares a history of colonialism and slavery.
  • Language diversity: Tribal, colonial, and national languages.
  • Mix of religions: Animism, Christianity, and Islam.

Climate and Environment in Sub-Saharan Africa

  • Predominantly tropical: Savannas, rainforests, and deserts.
  • Environmental issues: Desertification, deforestation (biofuels demand), energy poverty, reliance on wood, and wildlife loss.

Neoliberal Reforms in Latin American Economies

  • Privatization, increased foreign direct investment (FDI), and free trade agreements.
  • Significant Shaping economic landscape.

Challenges for Women in the Latin American Workforce

  • Inequality in terms of pay, opportunities, and working conditions.

Great Rift Valley

  • Tectonic rift zone in East Africa.
  • Influences landforms and ecosystems.

Berlin Conference Impact

  • Artificial colonial borders disregarding ethnic and tribal divisions.
  • Contributing to conflicts and instability.

Tribalism in African Geopolitics

  • Loyalty to ethnic group over the state.
  • Leads to divisions and conflicts.

Post-Colonial Instability in Africa

  • Apartheid, creation of homelands, civil wars stemming from colonial legacies.

Conflict Diamonds

  • Mined in war zones to finance armed conflict.
  • Exacerbating violence and instability.

African Union (AU)

  • Promotes peace, security, and stability.
  • Addresses conflicts and fosters cooperation.

Economic Challenges in Poorest World Region

  • Debt crisis, structural adjustment policies, widespread corruption (kleptocracy).

Mobile Technology and Economic Growth in Africa

  • Facilitating communication, access to information, and new business opportunities.

Trade Blocs in Africa

  • SADC (Southern African Development Community) and ECOWAS (Economic Community of West African States).
  • Aim to enhance economic cooperation and integration.

Global Ties and Africa's Economy

  • Primarily through aid and loans rather than trade.
  • Limits economic independence and growth.

Social Challenges in Africa's Development

  • Low education levels, high fertility rates, and underrepresentation of women in the formal economy.