CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -The seismic waves are reflected (bounced off) layers of different density, and they are refracted (bent) when they enter layers of different density. Some of them don’t go through liquid at all (the S waves).

Detailed explanation-2: -When seismic waves encounter a rock of a different density, it may reflect off of that layer, or bend as it travels across the boundary. By noting these patterns of reflection and refraction, one can determine the presence and depth of layers within Earth.

Detailed explanation-3: -Seismic Waves and Structure of Earth: Change in densities greatly varies the wave velocity. By observing the changes in velocity, the density of the earth as a whole can be estimated. By the observing the changes in direction of the waves (emergence of shadow zones), different layers can be identified.

Detailed explanation-4: -4 types of seismic waves are primary (P-wave), secondary (S-wave), Rayleigh and love waves. P and S waves are body waves. Rayleigh and Love waves are surface waves. P and S waves can travel inside the Earth with high speeds, whereas, Rayleigh and Love waves can travel slower speeds close to the Earth surface.

Detailed explanation-5: -There are three major kinds of seismic waves: P, S, and surface waves. P and S waves together are sometimes called body waves because they can travel through the body of the earth, and are not trapped near the surface. A P wave is a sound wave traveling through rock.