CBSE Questions for Class 8 Physics Some Natural Phenomena Quiz 4 - MCQExams.com

_________ and _________ towns of North Kashmir suffered from a major earthquake.
  • Uri, Tangdhar
  • Ladakh, Uri
  • Tangdhar, Ladakh
  • Bhuj, Kachchh
On $$26^{th} January, 2001$$, a major earthquake occured in _____ district of Gujarat.
  • Uri
  • Tangdhar
  • Bhuj
  • Kachchh
When did a major Tsunami occur in the Indian ocean?
  • On $$26^{th}$$ December, $$2004$$.
  • On $$26^{th}$$ July, $$2004$$.
  • On $$26^{th}$$ December, $$2001$$.
  • On $$26^{th}$$ July, $$2001$$.
Fill in the blank:

A sudden shaking or trembling of the Earth, caused by a disturbance deep inside the Earth's crust, is known as ________.
  • tsunami
  • flood
  • earthquake
  • landslides
The natural phenomenon which we are not yet able to predict accurately is:
  • Earthquake
  • Flood
  • Volcanic eruption
  • Thunderstorm
The Earth's crust is fragmented and each fragment is known as:
  • a spot
  • a plate
  • a valley
  • none of the above
It is safer to use mobile and cordless phone during lightning because?
  • They are wireless
  • Less chances of getting in contact with lightning
  • Both a & b
  • None of the above
Fill in the blank:

Most destructive earthquakes have magnitudes _______ on the Richter scale.
  • $$4$$
  • $$7$$
  • less than $$7$$
  • higher than $$7$$
The Earth's crust plates moves brushing past each other or collide. It causes:
  • Landslides
  • Volcanic eruption
  • Earthquake
  • None of these
The plates or the fragments of the Earth's crust are also known as:
  • Crust plates
  • Surface plates
  • Tectonic plates
  • None of the above
Fill in the blank:

Earth's plates are in _______ motion.
  • circular
  • vibrational
  • rotational
  • continual
The boundaries of the plates, called weak zones, are also known as:
  • danger zones
  • seismic zones
  • colliding zones
  • none of the above
The inner most part or the centre of the Earth is known as ________.
  • outer core
  • inner core
  • mantle
  • crust
Weak zones of plates are also known as:
  • seismic zones
  • fault zones
  • danger zones
  • both A and B
The layer below the crust is called _______.
  • Mantle
  • Plate
  • Outer core
  • Inner core
The most tremor-threatened areas in India are Kashmir, _______ and ________.
  • Western, Eastern Himalayas
  • Northern, Western Himalayas
  • Eastern, Central Himalayas
  • Western, Central Himalayas
Earthquakes are caused mostly due to:
  • Landslide
  • Flood
  • Tsunami
  • Movement of Earth's plates
Fill in the blank:

A weak earthquake has a magnitude _________ on a Richter scale.
  • between 4 and 7
  • between 2 and 4
  • equal to 7
  • more than 7
Is lightning static electricity?
  • Yes
  • No
  • Sometimes
  • None of the above 
An earthquake of magnitude $$7$$ or more in Richter scale is considered to be___________.
  • Strong
  • Weak
  • Medium
  • None of the above
Which of the following cannot be charged by rubbing or friction? 
  • A plastic scale
  • A copper rod
  • An inflated balloon
  • A woollen cloth
Which scale is used to measure the magnitude of earthquake?
  • Kelvin
  • Parcal
  • Celsius
  • Richter
Oppositely charged clouds, coming closer to each other, cause:
  • induction
  • conduction
  • lightning
  • none of the above
Seismograph is a instrument used to:
  • Record lightning
  • Record strength of wind
  • Record temperature
  • Record vibrations of earthquakes
How is lightning conductor installed during construction of building?
  • By keeping one end of the rod open to the air and another end of the rod buried deep in the ground.
  • By keeping one end of the rod closed and the other end is buried deep in the ground.
  • By keeping one end of the rod open to the air and the other end just touching the ground.
  • None of the above
Storms, cyclones, earthquake, lightning etc. are ................ natural phenomena:
  • constructive
  • destructive
  • simple
  • complex
Franklin showed that _______ and the spark from our clothes during winters are the same phenomena. 
  • Thunder-storm
  • Earthquake
  • Lightning
  • Rain
Can the lightning rods be made of any material?
  • Yes
  • No, it can only be made of metals.
  • No, it can be made with any type of bodies with neutral charge
  • None of these
_______ is nature's most powerful display of static electricity.
  • Current electricity
  • Lightning
  • Conduction
  • Induction
If we rub our dry forearm with a silk cloth, the hairs on the forearm will stand straight. This is because:
  • of the attraction force between the hairs and the cloth.
  • of the charge acquired to the forearm due to rubbing.
  • of the magnetic field created due to rubbing.
  • none of the above.
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