http://volcano.oregonstate.edu/vwdocs/vwlessons/activities/l_number3.html
This is actually an activity sheet asking students to label the high and low points of a volcano in Hawaii. This topographic map not only shows scale, but the elevation of several points on the volcano. The contour lines show areas of equal elevation, and you can tell where the slope is very steep based on how close together the lines are. This is interesting to me because you can see that the volcano has one area where the gradient of the slope is so steep that the lines nearly touch. With as scale of 1000 feet per line, that is a very steep slope!
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