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Important MCQ on Internal Structure of Earth for UPSC. We covered all the Important MCQ on Internal Structure of Earth for UPSC in this post for free so that you can practice well for the exam.
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Important MCQ on Internal Structure of Earth for UPSC Students
What usually happens when two tectonic plates slide past each other at varying speeds? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) Earthquake
B) Drought
C) Blizzard
D) Hurricane
Option a – Earthquake
Which type of earthquake waves move in a longitudinal direction? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) L waves
B) P waves
C) S waves
D) N waves
Option b – P waves
Which of the earthquake waves are classified as surface waves? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) P waves
B) L waves
C) S waves
D) M waves
Option b – L waves
Which type of earthquake is considered minor and typically occurs in underground mines and caves, triggered by rock bursts?
A) Explosion earthquake
B) Collapse earthquake
C) Reservoir induced earthquakes
D) Volcanic earthquake
Option b – Collapse earthquake
What can occur due to the shifting of fault lines?
A) Sudden rain
B) A flood
C) An earthquake
D) A storm
Option c – An earthquake
Which device is used to measure earthquake intensity? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) Barometer
B) Pyrometer
C) Seismograph
D) Calorimeter
Option c – Seismograph
According to the plate tectonics theory, the Earth’s lithosphere is divided into how many plates?
A) 6
B) 7
C) 12
D) 16
Option b – 7
Who introduced the concept of ‘sea floor spreading’ in 1962 through the work ‘The History of Ocean Basins’?
A) Louis Bauer
B) Harry Hammond Hess
C) Alfred Wegener
D) George Edward Backus
Option b – Harry Hammond Hess
Which statement correctly describes the ‘Pacific Ring of Fire’? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) Known for thermal power stations
B) Known for volcano and earthquake activity
C) Known for only glacial formations
D) Known for tropical rainforests
Option b – Known for volcano and earthquake activity
When an earthquake happens on the ocean floor causing one tectonic plate to sink beneath another, what natural disaster is most likely to follow?
A) Tornado
B) Tsunami
C) Cyclone
D) Typhoon
Option b – Tsunami
What is the name of the record created from earthquake measurements? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) Seismology
B) Seismogram
C) Seismograph
D) Seismic wave
Option b – Seismogram
Which statement about primary (P) waves in earthquakes is incorrect?
A) They are similar to sound waves.
B) They can only move through solid substances.
C) They can pass through gases, liquids, and solids.
D) They travel faster and are the first to reach the surface.
Option b – They can only move through solid substances.
Which factor does not influence the level of destruction caused by an earthquake?
A) Strength of the earthquake
B) Population density
C) Type of building
D) Climate of the area
Option d – Climate of the area
What is another term for the ‘Focus’ in an earthquake? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) Hypocentre
B) Epicentre
C) Principal Point
D) Isocentre
Option a – Hypocentre
In which part of the Earth are convection currents, responsible for moving tectonic plates, located?
A) Crust
B) Mantle
C) Outer core
D) Inner core
Option b – Mantle
Subduction zones in plate tectonics are linked to which of the following boundaries? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) Only convergent boundaries
B) Only divergent boundaries
C) Neither convergent nor divergent boundaries
D) Both convergent and divergent boundaries
Option a – Only convergent boundaries
Consider the following regarding earthquakes:
- The hypocentre is the point where the earthquake’s energy is released.
- The epicentre is the point on the Earth’s surface directly above the hypocentre.
Which of the above statements is/are correct?
A) Only 1
B) Only 2
C) Both 1 and 2
D) Neither 1 nor 2
Option c – Both 1 and 2
What is the origin point of earthquake waves called? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) Focus
B) Epicentre
C) Seismic Zone
D) Photosphere
Option a – Focus
Which of the following are benefits of tectonic activity in Iceland?
- Availability of natural geothermal energy
- Formation of new land
- Attraction for tourists
Select the correct answer:
A) Only 1
B) Only 2 and 3
C) Only 1 and 3
D) 1, 2, and 3
Option c – Only 1 and 3
Which of the following is not considered a minor tectonic plate?
A) Cocos Plate
B) Nazca Plate
C) Caroline Plate
D) Antarctic Plate
Option d – Antarctic Plate
Which option correctly defines the lithosphere?
A) Crust and core
B) Upper and lower mantle
C) Lower mantle and core
D) Crust and upper mantle
Option d – Crust and upper mantle
Which ‘discontinuity’ marks the boundary between the Earth’s crust and mantle? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) Mohorovicic
B) Gutenberg
C) Conrad
D) Repetti
Option a – Mohorovicic
Which of the following statements about earthquake waves is incorrect?
A) P waves move quickly and are the first to reach the surface.
B) P waves can pass through gases, liquids, and solids.
C) P waves can be detected by seismographs situated beyond 145° from the epicentre.
D) P waves cover the widest shadow zone region.
Option c – P waves can be detected by seismographs situated beyond 145° from the epicentre.
Which of the following statements are accurate? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
The Earth’s crust has a brittle nature.
The typical thickness of the oceanic crust is around 15 km, whereas the continental crust averages about 30 km.
Select the correct answer:
A) 1 only
B) 2 only
C) Both 1 and 2
D) Neither 1 nor 2
Option a – 1 only
Which of the following is found at the Earth’s deepest interior?
A) Conrad discontinuity
B) Moho discontinuity
C) Gutenberg discontinuity
D) Lehmann discontinuity
Option d – Lehmann discontinuity
Which of the following statements is/are true?
The hypocenter is the surface point closest to the earthquake’s focus.
Earthquake waves move more quickly through denser materials.
P waves travel the fastest and are the first to reach the Earth’s surface.
Select the correct answer:
A) 1 and 2
B) 2 and 3
C) 1 and 3
D) 3 only
Option b – 2 and 3
Which of the following statements correctly describe the Earth’s internal structure? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
The oceanic crust is heavier than the continental crust.
The Earth’s mantle holds most of the planet’s internal heat.
Heat circulates in large convection cells within the crust, which drives plate tectonics.
Select the correct answer:
A) 3 only
B) 1 and 2 only
C) 2 and 3 only
D) 1, 2, and 3
Option b – 1 and 2 only
Which of the following statements regarding earthquakes is/are correct?
The point vertically above the earthquake’s focus is called the epicentre.
Primary and Secondary waves are generated from the earthquake’s focus and spread outward.
Deep-focus earthquakes are usually more destructive than shallow-focus earthquakes.
Select the correct answer:
A) 1 only
B) 1 and 2 only
C) 2 and 3 only
D) 1, 2, and 3
Option b – 1 and 2 only
Which layer of the Earth is the thinnest? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) Inner Core
B) Outer Core
C) Mantle
D) Crust
Option d – Crust
Review the following statements:
In seismograph readings, P waves are detected before S waves.
P waves push particles to move back and forth along the wave’s direction, while S waves make particles move up and down at right angles to the wave’s direction.
Which of the statements above is/are correct?
A) 1 only
B) 2 only
C) Both 1 and 2
D) Neither 1 nor 2
Option c – Both 1 and 2
Which statements about Secondary (S) waves in earthquakes are correct?
S waves produce crests and troughs in the materials they pass through.
The vibration caused by S waves occurs at right angles to their direction of movement in the vertical plane.
Select the correct answer:
A) 1 only
B) 2 only
C) Both 1 and 2
D) Neither 1 nor 2
Option c – Both 1 and 2
Which statements regarding L-Waves (Long Waves) formed during an earthquake are correct?
L-Waves travel along the Earth’s outer surface.
They generally maintain a constant speed as they move.
Select the correct answer:
A) 1 only
B) 2 only
C) Both 1 and 2
D) Neither 1 nor 2
Option a – 1 only
Which scientific field is dedicated to the study and classification of the Earth’s surface formations?
A) Acarology
C) Ethology
D) Meteorology
Option b – Geomorphology
Who is commonly referred to as the Father of Geology? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) John Butler
B) Alfred Wegener
C) James Hutton
D) Art Smith
Option c – James Hutton
What are the forces called that work within the Earth’s interior?
A) Frictional forces
B) Gravitational forces
C) Exogenic forces
D) Endogenic forces
Option d – Endogenic forces
What is the name of the soft, weak, and slow-flowing layer in the Earth’s upper mantle? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) Exosphere
B) Asthenosphere
C) Lithosphere
D) Mesosphere
Option b – Asthenosphere
What is the term for the point on the Earth’s surface that lies directly above the earthquake’s origin?
A) Hypocentre
B) Epicentre
C) Semi centre
D) Centripiece
Option b – Epicentre
Which part of the Earth is the source of its magnetic field?
A) Inner core
B) Mantle
C) Outer core
D) Crust
Option c – Outer core
What is the Earth’s core mainly composed of? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) Nickel and Copper
B) Nickel and Alumina
C) Nickel and Magnesium
D) Nickel and Iron
Option d – Nickel and Iron
Which part of the Earth’s outer layer is lighter, thicker, and primarily consists of rocks like andesite and granite?
A) Mantle
B) Oceanic Crust
C) Continental Crust
D) Outer Core
Option c – Continental Crust
The Earth’s crust accounts for less than what percentage of the planet’s total mass?
A) 1%
B) 5%
C) 2%
D) 10%
Option a – 1%
Which theory about the Earth’s mantle was proposed by Arthur Holmes in the 1930s? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) Theory of Faunal Succession
B) Slab Pull Theory
C) Convectional Current Theory
D) Theory of Faulting
Option c – Convectional Current Theory
Which metal, the seventh most common in the Earth’s crust, is named from the medieval Latin term “Kalium”?
A) Aluminium
B) Magnesium
C) Calcium
D) Potassium
Option d – Potassium
What is the estimated thickness of the Earth’s lithosphere? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) 25 to 45 km
B) 10 to 25 km
C) 10 to 200 km
D) 5 to 10 km
Option c – 10 to 200 km
The Mohorovicic (Moho) discontinuity divides which layers of the Earth?
A) Lithosphere and Asthenosphere
B) Atmosphere and Hydrosphere
C) Earth’s Crust and Inner Core
D) Earth’s Crust and Mantle
Option d – Earth’s Crust and Mantle
Which Earth layer lies between the crust and the core?
A) Stratosphere
B) Country
C) Mantle
D) Magma Layer
Option c – Mantle
What is the correct arrangement of Earth’s layers from the outside to the center? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) Mantle (outermost) – Core – Crust (innermost)
B) Crust (outermost) – Mantle – Core (innermost)
C) Core (outermost) – Mantle – Crust (innermost)
D) Crust (outermost) – Core – Mantle (innermost)
Option b – Crust (outermost) – Mantle – Core (innermost)
Read the following earthquake statements:
Statement 1: When the pressure along plate boundaries exceeds friction, an earthquake is triggered, releasing energy as waves that cause ground shaking.
Statement 2: A foreshock is only identified after a larger earthquake occurs in the same region.
Select the correct answer:
A) Both Statements 1 and 2 are incorrect
B) Only Statement 2 is correct
C) Both Statements 1 and 2 are correct
D) Only Statement 1 is correct
Option c – Both Statements 1 and 2 are correct
Which of the following is NOT classified as one of Earth’s major tectonic plates? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) Nazca Plate
B) Pacific Plate
C) Africa with the Eastern Atlantic Floor Plate
D) India – Australia – New Zealand Plate
Option a – Nazca Plate
How many primary types of plate movements occur on Earth?
A) Three
B) Two
C) Five
D) Six
Option a – Three
Into how many seismic (earthquake) zones is India categorized? ( Important MCQ on Internal Structure of Earth for UPSC MCQ )
A) 4
B) 2
C) 5
D) 6
Option a – 4
We covered all the Important MCQ on Internal Structure of Earth for UPSC above in this post for free so that you can practice well for the exam.
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