(WGC) Exploring Our World People, Places, and Cultures

(WGC) Exploring Our World People, Places, and Cultures - E...

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Exploring Our World People, Places, and Cultures Chapter 1: Using Geography Skills Chapter Overviews Geography is the study of the Earth and its people. Physical geography examines physical aspects of the Earth such as land areas, bodies of water, and plant life. Human geography focuses on people and their activities such as religions, languages, and ways of life. In their study of people and places, geographers use five themes: location, place, human-environment interaction, movement, and regions. People use the information provided by geographers to plan, make decisions, and manage resources. In their study of Earth, geographers use many tools. Geographic Information Systems (GIS) are computer systems that gather, store, and analyze geographic information and then display it on a screen. They can also make maps. The Global Positioning System (GPS) is a group of satellites that use radio signals to determine the exact location of places on Earth. Satellite images of the Earth taken from space can help geographers determine how the Earth is changing. The Earth is one of eight planets in the solar system; it rotates on its axis every 24 hours and takes a year to orbit the sun. The tilt of the Earth in relation to the sun leads to changing seasons. Different hemispheres experience different temperatures and seasons because of their location in relation to the sun. The beginning of summer in one is the beginning of winter in the other. Similarly, the sun also affects Earth's temperatures. The sun's rays hit the low-latitude areas near the Equator directly, creating very warm temperatures. In the high latitudes of the North and South Poles, the sun's rays are indirect, so temperatures are always cold. Geographers use this knowledge of Earth's location in the solar system to understand how that location affects life on the planet. Chapter 2: Earth's Physical Geography Chapter Overviews Earth has a variety of landforms, and many of which can be found both on the continents and on the ocean floors. Forces from within and the actions of wind, 1
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Exploring Our World People, Places, and Cultures water, and ice have shaped Earth's surface. Inside the earth are four layers: the inner core, outer core, mantle, and crust. Scientists theorize that volcanoes, earthquakes, and continental drift are caused by the movement of tectonic plates that float on top of the liquid rock in the mantle. The forces of weathering and erosion also continually change the Earth's surface. About 70 percent of the Earth's surface is water, but only 3 percent of the water is usable freshwater. However, much of the freshwater is frozen in ice. The total amount of water on Earth does not change. The water cycle moves water from the oceans to the air through the process of evaporation. During this process, water changes from a liquid to a gas. When water vapor reaches cool air temperatures, condensation occurs: tiny droplets of water are suspended in clouds. Water returns to the ground, and finally back to the oceans, through precipitation such as rain or
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This note was uploaded on 05/20/2010 for the course SOCIAL SCI Social Sci taught by Professor N/a during the Spring '10 term at Open Uni..

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(WGC) Exploring Our World People, Places, and Cultures - E...

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