Discussion meeting 2
* a given contour line is ALWAYS at the same elevation.
* two different contour lines cannot cross.
* the closer contour lines are to each other, the steeper the topography; the farther apart they are, the gentler the topography.
* contour lines are wiggly because the landscape is typically irregular. --> Contour lines always make "Vs" which point up valleys.
* closed contour lines represent hilltops.
Make sure you understand these points!