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Bair Earth's Surface

Chapter 1

TermDefinition
system A group of objects that interact such as the four parts that make up Earth.
atmosphere The mixture of gases that surrounds and protects the Earth.
hydrosphere All water on Earth - in the atmosphere and in oceans, rivers, lakes and underground resvoirs.
bioshpere All living organisms on Earth: in the air, on the land and in the waters.
geosphere All features on Earth's surface - continents, islands and the seafloor and everything below the surface.
relief map A map that shows the differences in elevation in an area using contour lines, shading, or colors.
map scale The comparison of distance on a map with the actual distance on what the map represents.
map legend A chart that explains the meaning of each symbol used on a map. Also called a key.
equator An imaginary east-west line around the center of Earth that divides it into the Northern and Southern Hemispheres.
latitude The distance in degrees north or south from the equator.
longitude The distance in degrees east or west of the prime meridian. These lines are numbered from 0 to 180 degrees.
prime meridian An imaginary north-south line that divides the planet into the Eastern and Western Hemispheres.
projection A representation of Earth's curved surface on a flat map.
topography All natural and human-made surface features of a particualr area.
contour line The line on a topographic map that joins points of equal elevation.
contour interval On a topographic map, the difference in elevation from one contour line to the next.
slope A measure of how steep a landform is.
relief The difference in elevation between an area's high and low points.
elevation A measure of high something is above a reference point such as sea level.
Created by: srandall
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