Which of these are considered the most important map projections? Select all that apply. interrupted area
Mercator
great circle
polar
axis

The difference(s) between the grand canyon and valles marineris is/are: (a) the grand canyon was formed by water, but valles marineris was not. (a) valles marineris is much longer than the grand canyon. (c) valles marineris is much wider than the grand canyon. (d) valles marineris has large volcanoes near it. all of the above

These factors threaten north americas ecosystems

How many years is a term in the senate