Tag: structure of earth

Questions Related to structure of earth

The Earth's crust plates moves brushing past each other or collide. It causes:

physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. landslides

  2. volcanic eruption

  3. earthquake

  4. none of the above

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Correct Option: C
Explanation:

Any disturbance deep inside the Earth's crust leads to earthquake.

The uppermost layer of the Earth is:

physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. a huge single piece

  2. fragmented

  3. in two large pieces

  4. none of the above

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Correct Option: B
Explanation:

The Earth's crust is not a huge single piece. It is fragmented into pieces.

The plates or the fragments of the Earth's crust is also known as:

physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. crust plates

  2. surface plates

  3. tectonic plates

  4. none of the above

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Correct Option: C
Explanation:

Earth's crust is fragmented into pieces which are called plates. These plates are also known as tectonic plates.

Fill in the blank:

Most destructive earthquakes have magnitudes _______ on the Richter scale.

physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. $4$

  2. $7$

  3. less than $7$

  4. higher than $7$

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Correct Option: D
Explanation:

An earthquake of magnitude 7 is found to be destructive. And, obviously, most destructive earthquakes are of magnitude higher than 7 on the Richter scale.

Fill in the blanks:

The most tremor-threatened areas in India are Kashmir, _______ and ________.

physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. Western, Eastern Himalayas

  2. Northern, Western Himalayas

  3. Eastern, Central Himalayas

  4. Western, Central Himalayas

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Correct Option: D
Explanation:

In India, Kashmir, Western and Central Himalayas are some places which fall along or near to the fault zone. So, earthquakes are most likely to occur in those places.

The boundaries of the plates, called weak zones, are also known as:

physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. danger zones

  2. seismic zones

  3. colliding zones

  4. none of the above

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Correct Option: B
Explanation:

The weak zones are also known as seismic zones. These are zones where earthquake are most likely to occur.

Which scale is used to measure the magnitude of earthquake?

physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. Kelvin

  2. Parcal

  3. Celsius

  4. Richter

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Correct Option: D
Explanation:

Richter scale defines magnitude of the earthquake. Richter scale is not linear.

Fill in the blank:

A weak earthquake has a magnitude _________ on a Richter scale.

physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. between 4 and 7

  2. between 2 and 4

  3. equal to 7

  4. more than 7

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Correct Option: B
Explanation:

An earthquake of magnitude between 2 and 4, on Richter scale, is considered as weak, having less vibrational energy.

Seismograph is a instrument used to:

physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. Record lightning

  2. Record strength of wind

  3. Record temperature

  4. Record vibrations of earthquakes

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Correct Option: D
Explanation:

The tremors produces waves on the surface of the earth. These are called seismic waves. The waves are recorded by an instrument called seismograph.

An earthquake of magnitude $7$ or more in Richter scale is a _____ one?

physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. Stronger

  2. Weaker

  3. Medium

  4. None of the above

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Correct Option: A