Earthquakes and Volcanoes

Total Questions: 22

11. The movement inside the Earth's crust is studied by which of the following? [S.S.C. Online C.G.L.(T-I) 8.09.2016 (Shift-II)]

(a) Geology
(b) Seismology
(c) Plate tectonics
(d) Pantograph

Correct Answer: (b) Seismology

Solution:The movement inside the Earth's crust is studied by Seismology.

It is the branch of science concerned with earthquakes and related phenomena.

12. Which instrument is used to measure earthquakes? [S.S.C. Online CHSL (T-I) 10.01.2017(Shift-III)]

(a) endoscope
(b) thermometer
(c) sonograph
(d) seismograph

Correct Answer: (d) seismograph

Solution:Seismographs are used to measure earthquakes.

What It Measures:

P-waves (Primary, fastest)
S-waves (Secondary, slower)
Surface waves (most damaging)
Magnitude and epicenter location

The internal organs of the body are examined through an endoscope.

Temperature is measured with a thermometer.

13. Which of the following instruments is used for recording the magnitude and intensity of earthquakes? [S.S.C. JE Civil Exams 23.03.2021 (Shift-I)]

(a) Sonograph
(b) Spectrograph
(c) Sphygmograph
(d) Seismograph

Correct Answer: (d) Seismograph

Solution:Seismographs are used to measure earthquakes.

A seismograph (or seismometer) is an instrument used to detect and record earthquakes by measuring the vibrations (seismic waves) that travel through the Earth.

What It Measures:

P-waves (Primary, fastest)
S-waves (Secondary, slower)
Surface waves (most damaging)
Magnitude and epicenter location

14. The earthquake waves are recorded by an instrument called: [S.S.C. Online CHSL (T-I) 18.03.(Shift-II)]

(a) Speedometer
(b) Richter scale
(c) Seismograph
(d) Odometer

Correct Answer: (c) Seismograph

Solution:Seismographs are used to measure earthquakes.

A seismograph (or seismometer) is an instrument used to detect and record earthquakes by measuring the vibrations (seismic waves) that travel through the Earth.

What It Measures:

P-waves (Primary, fastest)
S-waves (Secondary, slower)
Surface waves (most damaging)
Magnitude and epicenter location

15. Which instrument records the waves reaching the surface during an earthquake? [S.S.C. Online CHSL (T-I) 13.10.2020 (Shift-III)]

(a) Manometer
(b) Seismograph
(c) Barograph
(d) Chronometer

Correct Answer: (b) Seismograph

Solution:Seismographs are used to measure earthquakes.

A seismograph (or seismometer) is an instrument used to detect and record earthquakes by measuring the vibrations (seismic waves) that travel through the Earth.

What It Measures:

P-waves (Primary, fastest)
S-waves (Secondary, slower)
Surface waves (most damaging)
Magnitude and epicenter location

16. Molten rock below the surface of the earth is called ___ . [S.S.C. Online C.G.L. (T-I) 1.09.2016 (Shift-I)]

(a) Basalt
(b) Laccolith
(c) Lava
(d) Magma

Correct Answer: (d) Magma

Solution:Molten rock below the surface of the earth is called Magma. It is a mixture of molten or semi-molten rock, volatiles, and solids. The magma came out to the earth's surface through the Crater/Mouth of the volcano.

When it erupts to the surface, it is then called lava.

17. Ring of Fire is found commonly in _________ [S.S.C. Online CGL (T-I) 3.89.2016 (shift-III)]

(a) Pacific Ocean
(b) Atlantic Ocean
(c) Indian Ocean
(d) Arctic Ocean

Correct Answer: (a) Pacific Ocean

Solution:Ring of Fire is found commonly in the Pacific Ocean.

The Ring of Fire is a ring of volcanoes around the Pacific Ocean that result from the subduction of oceanic plates beneath lighter continental plates.

18. A 'ring of fire' is a ring of _____________ around the Pacific Ocean, which results from subduction of oceanic plates beneath lighter continental plates. [S.S.C. JE Electrical Exams 10.12.2020 (Shift-II)]

(a) Volcanoes
(b) Tides
(c) Power
(d) Bush fires

Correct Answer: (a) Volcanoes

Solution:A 'ring of fire' is a ring of volcanoes around the Pacific Ocean, resulting from oceanic plate subduction beneath lighter continental plates.

19. "Tsunami" is the name given to which of the following? [S.S.C. Online C.G.L(T-I) 10.09.2016 (Shift-II)]

(a) Earthquake
(b) Cyclone
(c) Undersea Waves
(d) Tidal Waves

Correct Answer: (d) Tidal Waves

Solution:Tsunamis are waves produced by the collision or movement of plates located under the ocean, which appear as high waves on the sea surface.

20. Tsunami is caused by ___ . [S.S.C. Online C.G.L. (T-I) 7.06.2019(Shift-I)]

(a) strong winds driving water onshore
(b) lower atmospheric pressure
(c) underwater volcanic activity
(d) rocks underground suddenly breaking

Correct Answer: (c) underwater volcanic activity

Solution:Tsunamis are caused by underground volcanic activity.

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Earthquakes and Volcanoes

11. The movement inside the Earth's crust is studied by which of the following? [S.S.C. Online C.G.L.(T-I) 8.09.2016 (Shift-II)]

12. Which instrument is used to measure earthquakes? [S.S.C. Online CHSL (T-I) 10.01.2017(Shift-III)]

What It Measures:

13. Which of the following instruments is used for recording the magnitude and intensity of earthquakes? [S.S.C. JE Civil Exams 23.03.2021 (Shift-I)]

What It Measures:

14. The earthquake waves are recorded by an instrument called: [S.S.C. Online CHSL (T-I) 18.03.(Shift-II)]

What It Measures:

15. Which instrument records the waves reaching the surface during an earthquake? [S.S.C. Online CHSL (T-I) 13.10.2020 (Shift-III)]

What It Measures:

16. Molten rock below the surface of the earth is called ___ . [S.S.C. Online C.G.L. (T-I) 1.09.2016 (Shift-I)]

17. Ring of Fire is found commonly in _________ [S.S.C. Online CGL (T-I) 3.89.2016 (shift-III)]

18. A 'ring of fire' is a ring of _____________ around the Pacific Ocean, which results from subduction of oceanic plates beneath lighter continental plates. [S.S.C. JE Electrical Exams 10.12.2020 (Shift-II)]

19. "Tsunami" is the name given to which of the following? [S.S.C. Online C.G.L(T-I) 10.09.2016 (Shift-II)]

20. Tsunami is caused by ___ . [S.S.C. Online C.G.L. (T-I) 7.06.2019(Shift-I)]

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