Question

In what way does an earthquake provide evidence about the layers of Earth? Use complete sentences to write your answer.

Answer 1

Answer:

Study of the seismic waves

Explanation:

• The earthquake is a sudden release of wave energy in the earth and reaches the surface form the weakest points and this is said to be focus of the earthquakes they tend to in the form of the P, S, L waves and they have been studied through the help of the seismograph and the Richter scale, that records the slightest earth movements and thus helps in understanding the surface in the earth at greater depths.

• As these waves past through the earth material they bend, turn like the rays of light and this creates shadow zones due to the presence of a discontinuous zone under the earth like the gaps between the upper crust and the lower mantle is called as the Gutenberg discontinuity.  

Answer 2

Answer:

An earthquake provides evidence about the layers of Earth in a couple of ways. Seismic waves cause earthquakes. There are 4 types of seismic waves; primary, secondary, long and rayleigh waves. Primary waves travel through solids and liquids. Secondary, long and rayleigh waves only travel through solids. This helps us learn that Earth is composed of solid and liquid material.

Explanation: