When this vibration reaches an ear, it is translated into what we recognize as a sound. Sound vibration must travel through matter. This is typically air. When you say, Hello, to a friend, the air parts (called molecules) vibrate in small waves which travel to the friend and they hear the word Hello..
Continental crust is actually much thicker than oceanic crust. This is because Continental crust has been formed over a much longer period of time, and especially so due to sea-floor spreading (as new crust is constantly produced).
How is the crust under the ocean different from the crust below the continents? The crust under the ocean is thinner than continental crust. Ocean crust is also, on average, richer in minerals containing iron and magnesium, giving it a greater density tha â¦ n continental crust.