Department of Earth Science |Northeastern Illinois University

INTRODUCTION TO EARTH SCIENCE
ESCI 121

Section 06
Fall 2009

Daily Objectives #22  (November 19, 2009)                                                                                                         Dr. Sanders

By the end of today's class, you should be able to do the following:

TOPOGRAPHIC MAPS

w   Using a topographic map, determine the difference between steep and gentle slopes.

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Using a topographic map, find the elevation of a point.

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Determine the direction a stream flows based on a topographic map.

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Using a USGS topographic map, identify these landforms/features:

○  hill                               ○  valley                                   ○  closed depression (basin)
○  stream                        ○  intermittent stream            ○  lake

w   Using the scale on a topographic map, find the distance between two points.

w   Use a topographic map to estimate the latitude and longitude of a point.

w   Explain what is meant by "7.5-minute quadrangle".

 Using the topographic quadrangles provided, find at least one place that illustrates each of the following features.  Label and place a sticky note on one map or the other, to indicate the location of each feature.  It is necessary to find each feature only once. * a gentle slope   * a steep slope   * a closed depression   * a round hill top   * a ridge (elongated hilltop)   * a lake * a benchmark * a stream; find two places where contour lines cross the same stream and put sticky notes on the map to show both places.  Tell what direction the stream is flowing. * a “Gaging Station” along a stream      * a forested or undeveloped area (how can you tell?) * an urban area (how can you tell?)

w   Delineate a watershed based on a topographic map.

Department of Earth Science | Northeastern Illinois University

Copyright 2009 Laura L. Sanders.  Last updated November 19, 2009.