Some Natural Phenomena
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Lightning and Transfer of Electric Charges
SubtopicLightning and Transfer of Electric Charges under Some Natural Phenomena for Grade 8 CBSE.
Preview questions (no answers)
- 1.
What is the primary function of the gold leaves in a gold-leaf electroscope?
A.To conduct heat
B.To show the presence of charge by diverging
C.To attract light
D.To measure the weight of the charge
- 2.
An uncharged object has:
A.Only positive charges
B.Only negative charges
C.Equal number of positive and negative charges
D.No charges at all
- 3.
When air becomes a conductor during lightning, it is because:
A.Air is naturally a conductor
B.The accumulated charges become so large that air can no longer resist their flow
C.Air contains a lot of water
D.The clouds pull the air
Download the worksheet for Some Natural Phenomena - Lightning and Transfer of Electric Charges to practice offline. It includes additional chapter-level practice questions.
Lightning Safety and Lightning Conductors
SubtopicLightning Safety and Lightning Conductors under Some Natural Phenomena for Grade 8 CBSE.
Preview questions (no answers)
- 1.
Why is it said that 'Hearing thunder is a warning to rush to safety'?
A.Thunder means rain will ruin your clothes
B.Thunder always follows lightning, indicating a storm is nearby
C.The sound of thunder can damage your ears
D.Thunder clouds carry a lot of dust
- 2.
The process of transferring charge from a charged object to the Earth is called:
A.Electrification
B.Earthing
C.Induction
D.Reduction
- 3.
What is the risk of using a wired telephone during lightning?
A.The phone might explode from the sound
B.Lightning can travel through the telephone wires to the user
C.The call quality will be very poor
D.The phone battery will drain very fast
Download the worksheet for Some Natural Phenomena - Lightning Safety and Lightning Conductors to practice offline. It includes additional chapter-level practice questions.
Earthquakes: Causes and Seismographs
SubtopicEarthquakes: Causes and Seismographs under Some Natural Phenomena for Grade 8 CBSE.
Preview questions (no answers)
- 1.
Earthquakes can be caused by underground nuclear explosions. This is:
A.True
B.False
C.Only possible on the Moon
D.Never happens on Earth
- 2.
What happens to the energy of seismic waves as they move further away from the focus?
A.It increases
B.It decreases
C.It stays the same
D.It turns into light
- 3.
In the context of an earthquake, what is the 'Seismology'?
A.The study of stars
B.The study of earthquakes
C.The study of plants
D.The study of oceans
Download the worksheet for Some Natural Phenomena - Earthquakes: Causes and Seismographs to practice offline. It includes additional chapter-level practice questions.
Protection Measures against Natural Calamities
SubtopicProtection Measures against Natural Calamities under Some Natural Phenomena for Grade 8 CBSE.
Preview questions (no answers)
- 1.
Which of these is a safe action if you are outdoors during an earthquake?
A.Standing under a heavy balcony.
B.Moving to a clear, open spot away from structures.
C.Taking shelter under a large billboard.
D.Holding on to a street light pole.
- 2.
A tsunami is most likely to occur in which of the following areas?
A.In a deep forest.
B.In a desert region.
C.In coastal regions after an undersea earthquake.
D.On top of a high mountain.
- 3.
Why is it advised to keep fire-fighting equipment ready in buildings located in seismic zones?
A.Earthquakes always cause rain.
B.Earthquakes may cause short circuits leading to fires.
C.Fire helps in detecting tremors.
D.To keep the building warm during tremors.
Download the worksheet for Some Natural Phenomena - Protection Measures against Natural Calamities to practice offline. It includes additional chapter-level practice questions.