sentences: 10 to 30 seconds is a short amount of time & an earthquake usually occurs over a period of 10 to 30 seconds ->  an earthquake usually occurs in a short amount of time  shaking the ground of the earth can change earth's surface & an earthquake causes the ground to shake ->  an earthquake can change earth's surface by shaking the ground  an earthquake usually occurs in a short amount of time & an earthquake can change earth's surface by shaking the ground ->  an earthquake can change earth's surface in a short amount of time  an earthquake can change earth's surface in a short amount of time & in a short amount of time is similar to quickly -> an earthquake changes earth 's surface quickly