Question Q4GS1GS1

Climate investigation refers to earth-based observation. The nature of the body waves (P & S waves) of the earth's interior help understand the interior of the earth.

Introduction

27 words

Main Body

(i) Characteristics of P Waves:

(ii) Characteristics of S Waves:

This is why it is inferred that the inner core is solid.

(iii) Reason (Tilt) of the earth according to time of year:

[Diagram showing two circles representing Earth with sun rays, showing how sun's rays hit at different angles and heat distribution]

The sun hemisphere receives more heat, now the shadow zone gets more heat.

(iii) Understanding the interior:

(i) Since secondary waves cannot travel through outer core, and P-waves can be detected on other side of planet, it can be implied that the inner core is solid.

(ii) According to this is understood that pressure causes inner core to become cold despite high temperature.

Thus, shadow zone of a earthquake provides an indirect glimpse into the interior of the earth.

— Srishti Mishra · AIR 95

156 words6 paragraphs

Conclusion

Thus, shadow zone of a earthquake provides an indirect glimpse into the interior of the earth.

16 words

Diagram

Diagrams showing Earth and sun rays from different positions to illustrate seasonal heat distribution

Clear differentiation between P and S waves
Logical connection to interior structure
Uses diagrams for clarification
Logical deduction from wave properties
Clear explanation of shadow zone concept
Connects observations to interior structure

Open original scan

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Topper

Srishti Mishra

AIR 952023

Subject & Paper

GS1GS1

Topic

Salient features of World's Physical Geography

Important Geophysical Phenomena

Seismic investigation and Earth's interior

Writing Stats

199

Total words

Paragraphs

Explanatory with diagrams

Tone

Linked PYQ

Sivakasi in Tamil Nadu is known for its manufacturing clusters on firecrackers and matches. The local economy of the area is largely dependent on firecrackers industry. It has led to tangible economic development and improved standard of living in the area. So far as child labour norms for hazardous industries like firecrackers industry are concerned, International Labour Organization (ILO) has set the minimum age as 18 years. In India, however, this age is 14 years. The units in industrial clusters of firecrackers can be classified into registered and non-registered entities. One typical unit is household-based work. Though the law is clear on the use of child labour employment norms in registered/non-registered units, it does not include household-based works. Household-based work means children working under the supervision of their parents/relatives. To evade child labour norms, several units project themselves as household-based works but employ children from outside. Needless to say that employing children saves the costs for these units leading to higher profits to the owners. On your visit to one of the units at Sivakasi, the owner takes you around the unit which has about 10-15 children below 14 years of age. The owner tells you that in his household-based unit, the children are all his relatives. You notice that several children smirk, when the owner tells you this. On deeper enquiry, you figure out that neither the owner nor the children are able to satisfactorily establish their relationship with each other. Bring out and discuss the ethical issues involved in the above case. What would be your reaction after your above visit?

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