The fastest revolving planet around the sun

(a) Earth (b) Mars (c) Jupiter (d) Saturn

The large connected urbane area from boston to washington, d.c. is often referred to as

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

The formation of the planet uranus is estimated to have occurred approximately when?