The legend or the key provides the explanation of the symbols that are used on the maps. Texts like McKnight and Hess or Strahler and Strahler show these symbols, and they can be found at the various websites such as the USGS website at You will need to be familiar with these symbols. Either study this web site or the text and the continue on to the distance learning website to do the practice matching exercise that is available under the ASSIGNMENT area of Blackboard. After completing that activity, return to the Course Documents area to continue with the lesson.

Continue to the distance learning web site