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Unit #1 The Basics of Geography Chapters 1 — 4 Chapter 1 – The Five Themes of Geography Chapter Overview This chapter explains the Five Themes of Geography, and describes such tools of geographers as maps, globes, satellite images, and Geographic Information Systems (GIS). Section 1: The Five Themes of Geography Geographers study the use of space on earth. Geographers organize information about geography into five categories or themes. The Five Themes of Geography are location, place, region, movement, and human-environmental interaction. Section 1: The Geographers Perspective Geography The study of the distribution and interaction of physical and human features on the earth. Human Geography The study of the humans and their interaction with one another and the environment. Physical Geography The study of the physical features found on earth. Physical and Human Features on Earth Five Themes of Geography: Location Location “Where is it?” Described in two ways: absolute and relative. Absolute Location The exact place on earth where a feature is found (e.g. a city). Relative Location Describes a place in comparison with other places around it (e.g. direction, time, or direction). Five Themes of Geography: Location Grid System A system of lines to locate absolute locations on earth’s surface. Hemisphere One half of the globe (e.g. Northern, Southern, Eastern, Western). Equator Imaginary line that divides North and South. Five Themes of Geography: Location Prime Meridian Imaginary line that divides East and West. Also known as the Greenwich Meridian because the line runs through Greenwich, England. Latitude Imaginary lines that run parallel to the equator. Longitude Imaginary lines that go around the earth over poles. Five Themes of Geography: Place Place “What is it like?” Place includes the physical and cultural characteristics of a location. Physical features include climate, landforms, and vegetation. Human features include buildings, structures, and cultural elements. Five Themes of Geography: Region Region “How are places similar or different?” A region is an area of the earth’s surface with similar characteristics. Features can include physical, political, economic, or cultural characteristics. There are three types of regions: formal, functional, and perceptual. Five Themes of Geography: Region Formal Region Defined by a limited number of characteristics. The formal region discussed this semester will include: - Southwest Asia & North Africa - Sub-Saharan Africa - South Asia - East Asia - Southeast Asia, Oceania, and Australia - Europe - Russia & the Republics - Latin America - Canada & the United States Five Themes of Geography: Region Functional Regions Organized around a set of interactions and connections between places (e.g. a city and its suburbs). Perceptual Regions A region in which people perceive, or see, the characteristics of the region in the same way (e.g. the Midwest may be defined differently by people). Five Themes of Geography: HumanEnvironmental Interaction Human-Environmental Interaction “How do people relate to the physical world?” People learn to use what the environment offers them and to change the environment to meet their needs. People also adapt to live within the limits of their environment. Five Themes of Geography: Movement Movement “How do people, goods, and ideas move from one location to another?” Examples of movement include clothing, music, or places of entertainment. Geographers analyze movement by looking at three types of distance: linear, time, and psychological. Five Themes of Geography: Movement Linear Distance How far an idea, person, or product travels and how it is affected by physical geography. Time Distance The amount of time it takes an idea, person, or product to travel. Psychological Distance The perception of how people view an idea, person, or product travels. Section 2: The Geographers Tools Two basic tools of geographers are maps and globes. Most mapmaking today relies on data gathered by remote sensing, primarily by aerial photography or by satellites. Other important tools of geographers are Geographic Information Systems (GIS) and Global Positioning Systems (GPS). Maps & Globes Globe A 3-D representation of the earth. Map A 2-D representation of the earth. Portable and can be drawn to scale. Cartographer A Mapmaker. Map Projection A way of drawing the earth’s surface to reduce distortion caused by presenting a round earth on a flat service. Types of Maps Thematic Maps Emphasize specific kinds of information (e.g. climate or population). Navigational Maps Used by sailors and pilots to plot distance and direction. Topographical Maps Highlights general references (e.g. natural or man-made features). Surveying Field Survey Surveyors observe, measure, and record a specific area based on what they can see. Mapping & Remote Sensing From a distance, information is gathered from aerial photography (e.g. satellites) and stored for use. Data Collection Includes information (e.g. elevation, land cover, and variations of temperature) which is used to construct maps. Satellites Landstat A series of satellites which orbit above the earth and can collect data. Geostationary Operational Environmental Satellite (GOES) A weather satellite which can orbit in sync with the earth’s rotation to view the same area and is used to forecast weather. Geographic Informal Systems (GIS) & Global Positioning Geographic Information Systems (GIS) GIS stores information about the world in a digital database. Global Positioning System (GPS) The system uses a system of 24 satellites to find exact positions on the earth’s surface by tracking latitude, longitude, altitude, and time. GPS is used by hikers, sailors, and drivers. Map Projections Planar (Azimuthal) Projection A projection on a flat surface. Distorts size and shape. Conical Projection A projection onto a cone. Shape is accurate, but distorts landmasses at the edge. Compromise Projection A projection onto a cylinder. Three types of compromise projections: Mercator, Robinson, and homolosine. Types of Maps Physical Maps Help identify land features and bodies of water. Shows relief, contour lines, and shading. Political Maps Shows features created by humans. Shows cities, states, provinces, territories, or nations. Types of Maps Thematic Maps Focuses on specific types of information. Shows climate, vegetation, natural resources, population density, and economic activities. Flow-Line Maps Illustrates the movement of people, goods, animals, or glaciers. Shows location and direction of movement can be seen. Chapter 2 – Physical Geography: A Living Planet Chapter Overview This chapter describes the physical structure of the earth and the internal and external forces that shape the planet. Section 1: The Earth Inside and Out The earth is the only habitable planet in our solar system. The earth consists of a series of shelves that float on one another. The theory of the continental drift explains the formation of the continents. The Solar System Solar System The solar system consists of the sun and the nine known planets, as well as the celestial bodies that orbit the sun. The solar system also consists of the comets, asteroids, and other space debris orbiting the sun. Inside the Earth Core The center of the earth and is made up of nickel and iron. Mantle Surrounds the core and is made up of several layers. Magma Found in the mantle and made up of molten rock. Crust Thin layer of rock at the earths surface. On & Above the Earth Atmosphere Layer of gases which contains the oxygen we breathe, protect the earth from space debris, and provide a medium for weather and climate. Lithosphere The solid rock portion of the earth’s surface which make up the uppermost mantle and crust. Also makes up the land masses on the floor of the earth’s oceans and the seven continents. On & Above the Earth Hydrosphere Made up of the water elements on the earth’s surface which include the oceans, rivers, lakes, and water in the atmosphere. Biosphere Made up of the lithosphere, atmosphere, and hydrosphere and is the part of the earth where plants and animals live. Continental Drift Alfred Wegener German scientist who presented a theory in 1912 called the “Continental Drift” hypothesis. Continental Drift Theory maintains that the earth was once a supercontinent (Pangaea) that divided and slowly drifted apart for millions of years. Section 2: Bodies of Water & Landforms Water covers three-fourths of the earth’s surface and makes life possible. The water on earth is continuously circulated between the atmosphere, the oceans, and the earth. The ocean floor and the continents have similar landforms. Oceans & Motion Oceans The interconnected body of saltwater that covers 71% of the earth’s surface. Geographers divide the oceans into four main parts: Pacific, Atlantic, Indian, and Arctic. Ocean Motion The salty water of the ocean circulates through three basic motions: currents, waves, and tides. Oceans & Motion Currents Act like rivers flowing through the ocean moving water from one area to another. Waves Swells or ridges produced by wind. Tides The regular rise and fall of the of the ocean created by the moon and the sun. Oceans & Motion Transfer of Heat The motion of the ocean helps regulate and distributes the heat on the planet. Winds blow over the oceans and are cooled or heated. Eventually, winds reach the land and moderate the temperature and air over the land. Hydrologic Cycle Cycle of Water The hydrological cycle is the continuous circulation of water between the atmosphere, the oceans, and the land. (1) Water is heated and evaporates into the atmosphere; (2) as vapor, the water cools as it rises and condenses; (3) Clouds become saturated and the condensed water falls to the earth as rain, sleet, or snow; (4) Water soaks into the ground, evaporates into the atmosphere, or flows into rivers to be recycled. Lakes, Rivers, & Streams Lakes Hold more than 95% of all the fresh water and are usually the result of glacier action from the past. Rivers & Streams Flow through channels and move water to larger bodies of water. Drainage Basin A area drained by a major river or tributary. Landforms Landforms Naturally formed features on the earth’s surface Continental Shelf The edge of a continent to the deep part of the ocean. Ocean Landforms The floor of the ocean has ridges, valleys, canyons, and plains. Islands raise above the surface of the ocean from the ocean floor. Landforms Relief The major geographic feature that separates one type of landform from another relief. Topography The combination of the surface shape and composition of the landforms and their distribution in a region. Section 3: Internal Forces Shaping the Earth The earth’s crust consists of a number of tectonic plates. The movement of the tectonic plates continually reshapes the surface of the earth. Movement of the plates produces earthquakes and volcanoes. Plate Tectonics Tectonic Plates Large pieces of the lithosphere which form one of three types of boundaries: divergent, convergent, or transform. Divergent Boundary Plates move apart, horizontally Convergent Boundary Plates collide causing one plate to slide under another. Transform Boundary Plates slide past one another. Folds & Faults Fold Changes in the crust caused by the slow movement of rock under great pressure. Folds create the transformation of the crust and only occurs in a few centimeters or inches a year. Fault The fracture in the earth’s crust in which plates move past one another. Earthquakes Earthquakes The sliding or colliding of tectonic plates causing the earth to shake or tremble. Seismograph Detects earthquakes by measuring the size of the waves created by an earthquake. Epicenter The point directly above where the center of the earthquake occurred. Earthquake Damage Results of Earthquakes Earthquakes squeeze, stretch, and shear the land and structures by resulting in damage. Richter Scale Uses the information collected by seismographs to determine the strength of an earthquake. Tsunami A large wave in the ocean usually caused by an earthquake. Volcanoes Volcano A crack in the earth’s surface. Lava Magma which reaches the earth’s surface. Ring of Fire A zone around the rim of the Pacific Ocean where a vast majority of active volcanoes exist. Eight of the major tectonic plates meet at this zone. Section 4: External Forces Shaping the Earth Weathering and erosion alter the surface of the earth. Water, wind, and glaciers cause erosion that produces a variety of landforms. Weathering and erosion help form soil. Weathering Weathering Refers to the physical and chemical processes that change the characteristics of rock. Sediment Identified as mud, sand, or silt. Weathering Mechanical Weathering Only changes the size of the rock, not its composition. When ice crystals can cause a rock to fracture into smaller pieces. Chemical Weathering Occurs when rock is changed into a new substance as a result of the interaction between air, water, and minerals. Minerals can break down when exposed to O or C. Wind & Water Erosion Erosion Occurs when weathered material is moved by the action of wind, water, ice, or gravity (e.g. glaciers, waves, flow of water, or blowing wind). Delta When a river enters the ocean, the sediment is deposited in a fan-like V-shaped landform. Loess Windblown silt and clay sediment that produces fertile soil. Building Soil Forming Soil Weathering and erosion are part of the process of forming soil. Organic matter in the soil helps support plant life as well as water and air. The variety of soils and the climate in which they are found determine the types of vegetation. Humus The amount of organic material found in soil. Chapter 3 – Physical Geography: Climate & Vegetation Chapter Overview This chapter explains the causes of the seasons, weather, and climates, and describes the world’s climate and vegetation regions. Section 1: Seasons & Weather Seasons are caused by the earth’s tilt and revolution around the sun. Daily weather is the result of many factors, including solar energy, water vapor, cloud cover, landforms, bodies of water, and air movement. Types of extreme weather include hurricanes, tornadoes, blizzards, droughts, and floods. Seasons Earth’s Tilt & Revolution The seasons exist due to both the tilt of the earth on its axis and revolution of the earth around the sun. Some locations receive more direct sun rays because of the earth’s tilt. Tropics of Cancer & Capricorn The farthest points (north and south in relation to the equator) that the sun’s rays shine directly overhead at noon. Seasons Solstice The seasons of summer (June 21) and winter (December 22) begin. The farthest points (north and south in relation to the equator) that the sun’s rays shine directly overhead at noon. Equinox The seasons of spring (March 21) and fall (September 23) begin. Day and night are equal in length. Weather Weather The condition of the atmosphere at a particular location and time. Climate The Weather conditions at a particular location over a long period of time. Precipitation Falling water droplets in the form of rain, sleet, snow, or hail. Weather Extremes Hurricane A type of storm that forms over warm, tropical waters and transfers heat out of the tropics. Also called typhoons and cyclones. The storm can take days to develop and spread over an area. Tornado A powerful storm which is funnel-shaped and can develop without warning. Weather Extremes Blizzard A heavy snowstorm with winds over 35 miles which can dump feet of snow over a period of days. Drought A long period of time without rain or very minimal rainfall. Flood Occurs when water spreads out over an area not normally covered with water. Section 2: World Climate Regions Four major factors influence the climate of a region: wind and ocean current, latitude, altitude, and topography. Climates change over time. Some climate changes are natural, while others result from human activities. Factors Affecting Climate Wind Currents Distribute heat from the one part of the world to another part of the world. Winds are caused by Convection or the transfer of heat in the atmosphere in an upward motion of the air. Ocean Currents Similar to rivers as warm water is circulated to higher latitudes and cold water flows back to the equator. Factors Affecting Climate Zones of Latitude Low or tropical. Middle or temperate. High or polar. Elevation The distance above sea level. Temperature decreases as altitude increases. Topography Mountains trap moist air on one side and cause dry conditions on the opposite side. Changes in Climate El Nino The warming of waters off the coast of South America which occurs every two to seven years. Brings heavy rain to the Americas. La Nina The cooling of waters off the coast of South America which occurs every two to seven years. Brings heavy rain to Asia. Changes in Climate Global Warming The increasing temperature of the earth. Controversy exists as to the actual causes of the warming. Greenhouse Effect The layer of gases (released by the manmade and natural causes) into the atmosphere causing higher temperatures in the same way a greenhouse traps solar energy. Section 3: World Climate Regions Climate region definitions tell what typical weather conditions are like in a region. Temperature and precipitation define climate regions. A place’s location on a continent, its topography, and its altitude influence its climate. Defining a Climate Region Factors that Define Climate Temperature Precipitation Other Factors Location on a continent Topography of the land Altitude Five General Climate Regions Tropical Dry Mid-latitude High Latitude Highland Tropical Climates Tropical Wet Little variation in temperature (average 80 degrees annually). Annual rainfall is near 80 inches. Tropical Wet & Dry Temperatures range from cool and dry winters and warm and wet summers. Dry Climates Desert Deserts can be hot or cold and are categorized by the amount of rainfall. Receive less than 10 inches of rainfall, annually. Semiarid Annual rainfall is about 16 inches. Hot summers and mild-cold winters. Found in the interior of continents. Mid-latitude Climates Mediterranean Summers are dry and hot while winters are cool and rainy. Humid Sub-tropic Winters are mild and cool while summers are warm. Humid Continental Variation of temperature and rainfall. Marine West Coast Fog, damp, and moist conditions with rainfall spread evenly, annually. High-latitude Climates Sub-Artic Evergreen forests generally cover land in this region with extreme weather variations. Tundra Flat, treeless lands with permafrost (frozen ground) that forms a ring around the Arctic Ocean (less than 15 inches annually). Icecap Snow, ice, and permanent freezing temperatures annually. Highland Climate Highland Climate varies with altitude, latitude, topography, and continental location. Slope direction can also affect wind and moisture. Section 4: Soils & Vegetation Soil characteristics and climate are major influences on vegetation regions. There are four main types of biomes: forest, grassland, desert, and tundra. Human activities have altered the vegetation of many areas. Soil Regions Soil The thin layer of weathered rock, humus, air, and water. Human activities depend on the topsoil to support vegetation in a region. Vegetation Regions Ecosystem An interdependent community of plants and animals. Biome The ecosystem of a region which are divided into the following: forest, grassland, desert, and tundra. Forest Forest Categorized by the types of trees they support. Deciduous Broadleaf trees (e.g. maple, oak, birth, and cottonwood). Rainforest High concentration of broadleaf trees found in the tropics. Coniferous Needleleaf trees found in northern climates. Grassland Grassland Mostly flat areas with some trees. Savanna In tropical areas, the flat, grassy, mostly treeless plains. Steppe Temperate grasslands sometimes referred to as a prairie. Desert & Tundra Desert & Tundra In these extreme climates, plants are adaptive to survive cold and dry conditions. Tundra Plants Plants hug the ground (e.g. lichen and moss). Desert Plants Plants conserve water and withstand heat (e.g. cacti and shrubs). Chapter 4 – Human Geography: People & Places Chapter Overview This chapter explains the basic concepts in the main fields of human geography: culture, population, political systems, and economic systems. Section 1: The Elements of Culture Cultures change through innovation and the spread of ideas from one culture to another. Language, religion, and the arts are among the most important aspects of cultures. Defining Culture Culture The total knowledge, attitudes, and behavior shared by and passed on by members of a group. Involves: - food - religion - family - language - education - defense - social organization - creative expression Defining Culture Society A group that shares a geographic region, a sense of identity, and a culture. Ethnic Group Used to refer to a group that shares a language, customs, and a common heritage. Culture Change & Exchange Innovation Taking existing elements of society and creating something new to meet a need. Diffusion The spread of ideas, inventions, or the pattern of behavior to different societies. Cultural Hearth The heartland or a place of origin of a major culture. Acculturation The cultural change that occurs when individuals in a society accept or adopt and innovation. Language Language Allows people within a culture the ability to communicate. Language Identity Language helps establish unity or nationalism. Language Families The categorizing of languages of similar types in a group. Dialects A version of a language that reflects changes in speech patterns due to class, region, or cultural changes. Religion Religion The belief in a supernatural power or powers that are regarded as the creators and maintainers of the universe. Monotheism The belief in one god. Polytheism The belief in many gods. Animistic Belief in divine forces in nature. Major Religions Judaism Established nearly 3,200 years ago. Ethnic religion with followers called Jews follow the holy book known as the Torah. Christianity Established 2,000 years ago. Religion with followers called Christians who follow the teachings of Jesus Christ and the New Testament of the Bible. Islam Established in A.D. 613. A monotheistic religion based on the teachings of the prophet Mohammad and whose followers are known as Muslims. Major Religions Hinduism Established nearly 5,000 years ago. Polytheistic religion concentrated in India and whose followers believe in the divine spirit known as Brahman. Buddhism Religion established in 563 B.C. An offshoot of Hinduism, its founder Siddhartha Gautama (Buddha) rejected the caste system. Creative Cultural Expressions Performing Arts Developed by culture and is expressed through music, dance, theatre, and film. Visual Arts Architecture, painting, sculpture, and textiles are culturally related. Literature Poems, tales, and stories illustrate aspects of culture. Section 2: Population Geography The world’s population is growing at a rapid rate because of improved living conditions. Population density tells how heavily populated an area is. Worldwide Population Growth Birthrates The number of live births per total population, often expressed per thousand population. Fertility Rate The average number of children a woman of childbearing years would have in her lifetime. Mortality Rate The number of deaths per total population, often expressed per thousand population. Infant Mortality Rate The number of deaths per infant under the age of one-year per thousand live births. Population Pyramid Population Pyramid A graphic device that shows gender and age distribution of a population. Population Distribution Habitable Lands Populations live in the midlatitudes with mild climates with precipitation to support agriculture. Most populations live near the coast or rivers. Urban-Rural Mix About 50% of the world’s population live in rural areas. The number of people moving to urban settings is rising. Population Distribution Migration The movement of peoples within a country or region. Push Factors A factor that causes people to leave their homelands and migrate to another region. Pull Factors A factor that draws or attracts people to another location. Population Density Population Density The average number of people who live in a measurable area (usually a square mile). Carrying Capacity The number of organisms that a tract of land can support. Section 3: Political Geography The three main types of governments are democracy, monarchy, and dictatorship. Size, shape, and location influence a nation’s political geography. Nations of the World State An independent unit that occupies a specific territory and has full control of its internal and external affairs. Nation A group of people with a common culture living in a territory and having a string sense of unity. Nation-State When a nation and a state occupy the same territory. Types of Government Democracy A type of government in which citizens hold political power either directly or through elected representatives. Monarchy A type of government in which a ruling family headed by a king or queen holds political power and may or may share the power with citizen bodies. Types of Government Dictatorship A type of government in which an individual or a group holds total or complete political power. Communism An economic and political system in which the government holds nearly all political power and the means of production. Geographic Characteristics of Nations Size The size of a nation can determine the power and wealth, but is not always true (e.g. Britain). Shape The shape of a nation can impact how easily it can be governed, how goods are moved, and how it relates to its neighbors. Location Some nations have access to the sea, while others are landlocked. Landlocked Having no outlet to the sea. National Boundaries Natural Boundaries Based on a physical feature (e.g. river, lake, or mountain). Artificial Boundaries A fixed line generally following a latitude or longitude line. Regional Political Systems Regional Political Systems Nations may join to form international political, military, or economic units. - United Nations (Political) - North Atlantic Treaty Organization or NATO (Military) - European Union (Economic) Section 4: Urban Geography Almost half of the world’s population lives in urban areas. Cities half the world have certain geographic characteristics and land use patterns in common. Growth of Urban Areas Urban Geography The study of how people use space in cities. Cities An area that is the center of business and culture and has a large population. Suburbs A political unit or community touching the borders of the central city or touching other suburbs that touch the city. Growth of Urban Areas Metropolitan Area A functional area including a city and its surrounding suburbs and exurbs, linked economically. Urbanization The dramatic rise in the number of cities and the changes in lifestyle that result. Economic Systems Economy The production and exchange of goods and services among a group of people. Economic System The way people produce and exchange goods. Types of Economic Systems Traditional Economy A type of economic system which is passed on from family to family (found primarily in under-developed and developing nations). Command Economy A type of economic system in which production of goods and services is determined by central government, which usually owns the means of production; also called a planned economy. Market Economy A type of economic system in which production of goods and services is determined by the demand from consumers; also called a demand economy or capitalism. Mixed Economy The type of economy which is market-oriented, but regulated by government. Economic Activities Primary Activities The process of retrieving raw materials or resources for human consumption (e.g. fishing, farming, mining). Secondary Activities The process of taking raw materials and manufacturing them into finished products (e.g. steel into cars, wheat into cereal). Tertiary Activities The process of providing services (e.g. selling automobiles, teaching, accounting, law, restaurant). Quaternary Activities The process of providing and using information in society (e.g. researching for vaccines). Economic Natural Resources Natural Resources A material on or in the earth, such as a tree, fish, coal, that has economic value. Renewable Resource A material that can replenished and used again (e.g. trees, animals, etc.). Non-Renewable Resource A material which cannot be replaced once it has been used (oil, coal, natural gas, etc.). Inexhaustible Resource A material which is boundless or plentiful (e.g. solar, wind, and water power). Economic Support Systems Infrastructure The basic support systems needed to keep an economy going, including power, communications, transportation, water, sanitation, and educational systems. Per Capita Income The average amount of money earned by each person in a political unit. Gross National Product (GNP) The total value of all goods and services produced by a country in a period of time. Gross Domestic Product (GDP) The value of only goods and services produced within a country in a period of time. Economic Development Levels Under-Developed Nations Nations which are characterized by the lack of industrialization, infrastructure, high birth rates, high death rates (e.g. Rwanda). Developing Nations Nations still industrializing and modernizing infrastructure, (e.g. Iraq). Developed Nations Nations which are in post-industrialization, have a sophisticated infrastructure, low birthrates, and long lifespans (e.g. the United States, Canada, Europe, and Japan).