Waves that travel in the rocks below the surface of the earth are called body waves, and there are two types of body waves: primary, or P, waves, and secondary, or S, waves. The S waves, also known as shearing waves, cause the most damage during earthquake shaking, as they move the ground back and forth.arthquake, shaking of the earth's surface caused by rapid movement of the earth's rocky outer layer. Earthquakes occur when energy stored within the earth, usually in the form of strain in rocks, suddenly releases.
Confidence votes 198. You technicaly become a teenager at age 13, because it ends with teen, but puberty begins around 10 if you are going by when they hit puberty. Was this answer useful? Bekah213.
teen definition: The definition of teen is something related to or characteristic of adolescents between age 13 and 19. (adjective) A movie that caters to kids aged 14-19 is an example of a teen movie....