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Ch2 Sec2 Models of Earth

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Key Concepts How do maps and globes represent Earth’s surface? What reference lines are used to locate points on Earth? What are three common map projections?

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Key Terms Map Globe Scale Symbol Key Degree Equator Hemisphere Prime meridian Latitude Longitude Map projection

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Ch2 Sec2 Map: is a flat model of all or part of Earth’s surface as seen from above Globe: is a sphere that represents Earth’s entire surface Maps and globes are drawn to scale and use symbols to represent topography and other features on Earth’s surface Scale: relates distance on a map to a distance on Earth’s a surface Symbols: mapmakers use shapes and pictures Key: or legend, is a list of all the symbols used on the map with an explanation of their meaning

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Ch2 Sec2 Two of the lines that make up the grid, the equator and prime meridian, are the baselines for measuring distances on Earth’s surface Degree: is 1/360 of the distance around a circle Equator: forms an imaginary line that circles Earth Hemisphere: is one half of the sphere that makes up Earth’s surface Prime meridian: makes a half circle from the North Pole to the South Pole

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Ch2 Sec2 The lines of latitude and longitude form a grid that can be used to find locations anywhere on earth Latitude: the equator is the starting line for measuring Longitude: the distance in degrees east or west of the prime meridian

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Ch2 Sec2 Map projection: is a framework of lines that helps in transferring points on Earth’s 3- dimensional surface onto a flat map Three common map projections are the Mercator projection, the Equal-Area projection, and the Conic projection

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