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.
Most adults know what a 'teenager' is. But, if it's been a few years since you've been one, you may have forgotten all those things that accompany those teen years. The teen years are a time of change, learning and experimentation. And today's technology means teens are expressing themselves and communicating in different ways than generations past. What is a Teenager? Teen or teenager is a term widely used to describe an age group between childhood and adulthood. Generally, the accepted ages for teen or teenager are 13 to 19 years of age. They will also have a lot of fun as the teen turns into a young adult and enjoys more mature conversations and experiences.