Changes on the earth's surface can be abrupt (earthquakes) or slow (glacial cutting) and the earth's surface is shaped in part by the motion of water and wind over very long periods of time.
(Changes on the earth's surface; can be; abrupt (earthquakes) or slow (glacial cutting) and the earth's surface is shaped in part by the motion of water and wind over very long periods of time) (the earth's surface; is shaped; by the motion of water and wind over very long periods of time)
Changes on the earth's surface the earth's surface
can be is shaped
abrupt (earthquakes) or slow (glacial cutting) and the earth's surface is shaped in part by the motion of water and wind over very long periods of time
by the motion of water and wind over very long periods of time