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.
When teens start at 15 years old with actual group dating you can support the child's dating choices and supervise their decisions, she says. I saw it all throughout college.Those with very strict lives went wild in college.our teen might want to date, but is she ready? Sixteen-- and even a bit older -- is a good age for dating, provided that the teen is mature, says Dr. Wish.