Chapter 3: Interior of the Earth — Online MCQ Test
GEOGRAPHY · CLASS 11 FIRST PUC · Karnataka State Board
Practice Chapter 3: Interior of the Earth with a free chapter-wise online MCQ test.
This chapter covers: This chapter details crust mantle core layers seismic wave analysis earthquake causes intensity distribution volcanic activity volcano types and rock mineral classifications..
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 3: Interior of the Earth — Important Questions & Answers
Which layer of the Earth is the thinnest?
- A. Mantle
- B. Core
- C. Crust
- D. Asthenosphere
Answer: C. Crust
The crust is the outermost and thinnest layer of the Earth. It is much thinner than the mantle and core.
The crust is the outermost and thinnest layer of the Earth. It is much thinner than the mantle and core.
The boundary between the Earth's crust and mantle is called the:
- A. Gutenberg discontinuity
- B. Moho discontinuity
- C. Conrad discontinuity
- D. Lehmann discontinuity
Answer: B. Moho discontinuity
The Mohorovičić discontinuity, or Moho, separates the crust from the mantle. It is identified by a sudden change in seismic wave velocity.
The Mohorovičić discontinuity, or Moho, separates the crust from the mantle. It is identified by a sudden change in seismic wave velocity.
Which one of the following is a type of seismic wave?
- A. Longitudinal wave
- B. Transverse wave
- C. Both P-waves and S-waves
- D. Circular wave
Answer: C. Both P-waves and S-waves
P-waves are longitudinal, while S-waves are transverse. Both are seismic waves generated during an earthquake.
P-waves are longitudinal, while S-waves are transverse. Both are seismic waves generated during an earthquake.
If S-waves are not detected beyond a certain point on the Earth's surface, the most likely conclusion is that the region they cannot pass through is:
- A. Solid mantle
- B. Liquid outer core
- C. Crustal plateau
- D. Continental shelf
Answer: B. Liquid outer core
S-waves cannot travel through liquids, so their disappearance indicates the presence of a liquid layer. This is one of the key proofs for the liquid outer core.
S-waves cannot travel through liquids, so their disappearance indicates the presence of a liquid layer. This is one of the key proofs for the liquid outer core.
A volcano with a wide base, gentle slopes, and fluid lava eruptions is most likely a:
- A. Shield volcano
- B. Composite volcano
- C. Cinder cone volcano
- D. Caldera volcano
Answer: A. Shield volcano
Shield volcanoes are built by low-viscosity lava that spreads over a large area, forming broad and gentle slopes. This is unlike steep composite or cinder cone volcanoes.
Shield volcanoes are built by low-viscosity lava that spreads over a large area, forming broad and gentle slopes. This is unlike steep composite or cinder cone volcanoes.