Prior to a large earthquake, smaller quakes may be detected. What
are these called?
Select one:

Prequakes

Foreshocks

Aftershocks

Magnitudes

Which of there factors contributed most to us westward expansion in the second half of the nineteenth century?

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

Why does a tidal bulge occurs on opposote sides of earth