Earthquakes and Volcanoes (World Geography)

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)]

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)]

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)]

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)]

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)]

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)]

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)]

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)]

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)]

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)]

Correct Answer: (c) underwater volcanic activity
Solution:Tsunamis are caused by underground volcanic activity.