a map of your state showing all counties. Color
the map so that neighboring counties have different colors.
How many colors did you need?
Find a map of the
U.S. where states are colored. Do neighboring
states get different colors? How many colors does the
Make a map that requires only
three colors and that is different from the
Find maps of
the U.S. in 1790, when
there were only the 13 original colonies. How
many colors does that map need? How about
a map of the US in 1810, or 1850?