Wave in which particles in the medium vibrate back and forth along the path the wave travels

the earthquake in haiti was a magnitude of 7.0 according to the u.s geological survey yet the smaller earthquake in haiti killed more than 200,000 and left more than 1.2 million people homeless. the chile earthquake was a magnitude of 8.8 and 500 times more stronger but chile's earthquake only injured 712 people.

answer; collectivism;

answer; clear and present danger test;

answer; clelia mosher;