Solved UPSC CDS/OTA Question
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Q · Internal Structure of The Earthmedium · 45s
Which layer lies directly beneath the crust?
TopicInternal Structure of The Earth
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Beneath the Earth's crust lies the mantle, a vast layer of semi-solid rock extending approximately 2,900 kilometers deep. The mantle's rock convects slowly, driving plate tectonics and causing earthquakes and volcanic activity. It is composed predominantly of silicate minerals rich in magnesium and iron.
Final Answer: Option C - Mantle