Topic– Part of static series under the heading – “Interior of the Earth”
4) Bring out the relevance of seismic study in determining the structure of earth’s interiors?(250 words)
NCERT Class XI Physical Geography Ch 3
Key demand of the question
The question expects us to explain how seismic study can help us in understanding the composition, structure of interior of the Earth.
Structure of the answer
Introduction – Explain what seismic study is -Seismic study is the study of the energy waves generated inside the earth due to movements in earth’s crust. Mention that understanding the interior of the earth, its compositions, its mechanical & chemical properties and the structural arrangements hold a key to understand the numerous features and landforms we have on the earth surfaces
Body – Explain how the behaviour of P and S waves tell us a lot about the interior of Earth. Explain in detail how seismic study helps in figuring out the structure of interior of Earth using P and S waves and also explain what are shadow zones etc. Also explain the other reasons why this study is important as inaccessible interior thus seismic study provides a window into understanding the interior of the Earth.