Department of Earth Science |Northeastern Illinois University

INTRODUCTION TO EARTH SCIENCE
ESCI 121, Fall 2006

Daily Objectives #24  (November 16, 2006)                                                                        Dr. Sanders

Homework #4 is due at class time next Tuesday, November 21.
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 LAST TIME

* List elements that should appear on any map; explain how to interpret them (scale, north arrow, coordinate system, key/legend, title).

* Explain what a contour line on a topographic map represents; tell what contour interval means and how to determine what the contour interval is on any given topographic map.

* Explore and practice the principles of contouring by participating in the following activity (see the Nov 14 agenda for larger font version of all three activities we did last time).

 ACTIVITY ONE Crease a sheet of paper and stand it up on your desk like a tent.  Using the principles of contouring, draw the contour lines that would appear on it.  Then, draw the map that would illustrate those contours.  Flip the paper upside down so it forms a "V".  Draw the equal elevation contours and map.  Start with a fresh piece of paper, crease it, and prop one end of it on a book so it forms a tilted tent.  Draw the topographic contours and map.  Finally, flip the paper upside down so it forms a "V", tilt it, and draw the contours and map.

NEW THIS TIME

* Explore the USGS stream water data site.

* Explain what a watershed is.  (Note: it is not well explained in our textbook.  Try googling --> watershed definition <-- to find some online resources.)

* Explain what a drainage area is.  (Try googling   -->  "drainage area" definition <-- to find online resources.)

* Use the Public Land Survey system (Township, Range, Section, Quarter of quarter of quarter)  to locate specific points on a map.

Department of Earth Science | Northeastern Illinois University

© 2006 Laura L. Sanders.  Last updated November 16, 2006.