Department of Earth Science |Northeastern Illinois University

INTRODUCTION TO EARTH SCIENCE
ESCI 121, Fall 2006

Daily Objectives #25 (November 21, 2006)                                                                        Dr. Sanders

Homework #4 is due at class time!
To view it, go to the course home page and click the yellow box labeled "Homework".

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

REVIEW FROM PREVIOUS SESSIONS

* Identify and use the five components common to all maps: title, north arrow, key/legend, coordinate system, scale.

* Explore and practice the principles of contouring and using the topographic map key by participating in the following activity (see the Nov 14 agenda for larger font version of all three activities we did that day).
 ACTIVITY THREE Using the topographic quadrangles of Chicago Loop and Palos Park and the key to topographic map symbols, find a place that illustrates the following features.  Label and place sticky notes on the map to indicate the location of each feature. * a gentle slope   * a steep slope   * a closed depression   * a round hill top   * a ridge (elongated hill)   * 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?)

* Use the Public Land Survey system coordinate system (Township, Range, Section, Quarter of quarter of quarter)  to locate specific points on a topographic map.  Example: using the Palos Park quadrangle, locate the building in the following location: T37N, R12E, Sec. 14, NW ¼, SW ¼, SW ¼.

NEW THIS TIME

* Use the coordinate system of latitude and longitude to specify or identify a location on a topographic map.

* Explain what it means to say a map is a 7.5-minute map, and explain the difference between 7.5- and 15-minute maps.

* Use the graphical scale on a topographic map to measure distances.  In class we used the following quads to locate and using the map scale, measure the width of the floodplain of the Mississippi River: Rockwood, Kaskaskia, Selma, Cahokia, and Blackhawk, IL.

*  Complete a worksheet using several different maps, identifying features, using the key, measuring distances, and using coordinate systems.

Department of Earth Science | Northeastern Illinois University

© 2006 Laura L. Sanders.  Last updated November 21, 2006.