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Home › Geography › Earth's Structure

Earth's Structure — Geography Questions & Practice

Practise 16 Earth's Structure questions from Geography for competitive exams such as UPSC, Banking, SSC and Railway. Read the worked questions below, check every answer with an explanation, and track what you get wrong.

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Practice questions on Earth's Structure — with answers

Try each question first, then open the answer. Explanations are included.

1. Which layer of the Earth is described as: 'The outermost solid layer of the Earth, composed mainly of silica and alumina (SIAL) in continents and silica and magnesium (SIMA) in oceans'?

  1. AMantle
  2. BInner Core
  3. CAsthenosphere
  4. DCrust
Show answer

Answer: D

This describes the Crust.

2. Which layer of the Earth is described as: 'The layer beneath the crust, composed mainly of silicate rocks rich in iron and magnesium, extending to about 2,900 km depth'?

  1. AMantle
  2. BOuter Core
  3. CLithosphere
  4. DInner Core
Show answer

Answer: A

This describes the Mantle.

3. Which layer of the Earth is described as: 'A liquid layer composed mainly of iron and nickel, responsible for generating the Earth's magnetic field'?

  1. ACrust
  2. BMantle
  3. COuter Core
  4. DInner Core
Show answer

Answer: C

This describes the Outer Core.

4. Which layer of the Earth is described as: 'The innermost solid layer of the Earth, composed mainly of iron and nickel, under extremely high pressure and temperature'?

  1. AInner Core
  2. BAsthenosphere
  3. CLithosphere
  4. DOuter Core
Show answer

Answer: A

This describes the Inner Core.

5. Which layer of the Earth is described as: 'The rigid outer layer of the Earth, comprising the crust and the uppermost part of the mantle'?

  1. AInner Core
  2. BCrust
  3. CMantle
  4. DLithosphere
Show answer

Answer: D

This describes the Lithosphere.

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