steady as she goes! meaning, steady as she goes! definition | English Cobuild dictionary. steady. 1 adj A steady situation continues or develops gradually without any interruptions and is not likely to change quickly. Despite the steady progress of building work, the campaign against it is still going strong...
Seismic waves are divided into two types: Body waves and surface waves. Body waves include P and S waves, and these are the two types of waves that are used to determine the internal structure of the Earth. (There are other types of seismic waves, but they relate to surface damage and only travel through the Earth s crust, not the entire Earth. If you are interested though, there is a short activity to show you what they are and how they move.
The three types of seismic waves are primary waves, secondary waves and surface waves. Seismic waves can cause earthquakes and have destructive capability. Primary and secondary waves are known as body waves, and these waves penetrate the interior of the Earth, whereas surface waves do not penetrate the Earth. Continue Reading. Primary waves are also known as pressure waves and travel at the highest velocity inside the Earth.