The appalachian mountains run through which of the following u. s. regions below?
a. midwestern u. s.
b. interior western u. s.
c. southern u. s.
d. the pacific states

Which of the following is evidence to the past existence of glaciers?

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

If a volcano’s magma is high in silica, the volcano will probably a. erupt quietly. b. remain dormant. c. erupt explosively. d. produce dark-colored lava.