Some Natural Phenomena Part 4: MCQs (Q76–Q100)
🌩️ Some Natural Phenomena – MCQs for Class 8 Science
Part 4: Q76–Q100
Q76. Which one of the following can trigger a tsunami?
A) Cyclone
B) Earthquake under the sea
C) Tornado
D) Drought
✅ Correct Answer: B) Earthquake under the sea
Explanation:
- B) ✔ Underwater earthquakes displace water → tsunami.
- A, C, D do not directly cause tsunamis.
Q77. Which instrument records the seismic waves of an earthquake?
A) Seismograph
B) Thermometer
C) Electroscope
D) Hydrometer
✅ Correct Answer: A) Seismograph
Explanation:
- A) ✔ A seismograph measures and records seismic vibrations.
Q78. Which one of these is NOT a precaution during an earthquake?
A) Take shelter under a strong table
B) Stay in open ground
C) Stand near windows and mirrors
D) Stay away from glass
✅ Correct Answer: C) Stand near windows and mirrors
Explanation:
- C) ✔ Glass can shatter → unsafe.
Q79. During lightning, charges move:
A) From Earth to clouds only
B) From clouds to Earth only
C) From one part of cloud to another or between cloud and Earth
D) Randomly
✅ Correct Answer: C) From one part of cloud to another or between cloud and Earth
Explanation:
- C) ✔ Lightning can occur within clouds or between cloud and Earth.
Q80. Which of these is the BEST protection from lightning in open fields?
A) Standing under tall trees
B) Standing near poles
C) Sitting inside a car
D) Standing with umbrella
✅ Correct Answer: C) Sitting inside a car
Explanation:
- C) ✔ Cars act as Faraday cages, charges pass outside.
Q81. The scale used to measure earthquake intensity based on observations is:
A) Kelvin scale
B) Mercalli scale
C) Richter scale
D) Celsius scale
✅ Correct Answer: B) Mercalli scale
Explanation:
- B) ✔ Mercalli scale measures earthquake intensity felt by people.
Q82. Which of the following is a precaution during lightning at home?
A) Use mobile phones
B) Switch off electrical appliances
C) Stand near windows
D) Take bath outside
✅ Correct Answer: B) Switch off electrical appliances
Explanation:
- B) ✔ Prevents damage from surges due to lightning.
Q83. Earthquakes and volcanoes mostly occur in:
A) Central deserts
B) Coastal plains
C) Plate boundaries
D) Polar regions
✅ Correct Answer: C) Plate boundaries
Explanation:
- C) ✔ Plate movements are strongest at boundaries.
Q84. A large sea wave caused by an earthquake is called:
A) Cyclone
B) Tsunami
C) Tornado
D) Storm surge
✅ Correct Answer: B) Tsunami
Explanation:
- B) ✔ Underwater disturbances → tsunamis.
Q85. The spark produced when we touch a metal after walking on carpet is due to:
A) Current electricity
B) Static electricity
C) Magnetism
D) Heat
✅ Correct Answer: B) Static electricity
Explanation:
- B) ✔ Static charge accumulates and discharges suddenly.
Q86. The line along which two tectonic plates meet is called a:
A) Seismic zone
B) Fault line
C) Epicentre
D) Focus
✅ Correct Answer: B) Fault line
Explanation:
- B) ✔ Fault lines mark boundaries where quakes originate.
Q87. Which is the safest place during an earthquake in a city?
A) Open park
B) Near high-rise buildings
C) Inside an elevator
D) On a flyover
✅ Correct Answer: A) Open park
Explanation:
- A) ✔ Open areas minimize falling hazards.
Q88. Who proved through experiments that lightning and electricity are the same?
A) Newton
B) Faraday
C) Benjamin Franklin
D) Edison
✅ Correct Answer: C) Benjamin Franklin
Explanation:
- C) ✔ Franklin’s kite experiment proved lightning = electric discharge.
Q89. During electrostatic charging, charges are transferred by:
A) Protons
B) Electrons
C) Neutrons
D) None
✅ Correct Answer: B) Electrons
Explanation:
- B) ✔ Only electrons move during charging.
Q90. Which type of electricity is used in homes?
A) Static electricity
B) Current electricity
C) Neutral electricity
D) Magnetic electricity
✅ Correct Answer: B) Current electricity
Explanation:
- B) ✔ Continuous flow of charge = current electricity.
Q91. Which of the following is NOT an effect of earthquake?
A) Ground shaking
B) Tsunami
C) Lightning
D) Landslide
✅ Correct Answer: C) Lightning
Explanation:
- C) ✔ Lightning is unrelated to earthquakes.
Q92. Which natural disaster often follows an undersea earthquake?
A) Cyclone
B) Tsunami
C) Tornado
D) Landslide
✅ Correct Answer: B) Tsunami
Explanation:
- B) ✔ Undersea quakes displace water → tsunami waves.
Q93. Which natural phenomenon is similar to spark observed when we take off woollen clothes?
A) Earthquake
B) Lightning
C) Cyclone
D) Tsunami
✅ Correct Answer: B) Lightning
Explanation:
- B) ✔ Both are static electricity discharges.
Q94. Earthquakes can cause destruction because:
A) They change Earth’s weather
B) They release huge energy
C) They bring rain
D) They generate wind
✅ Correct Answer: B) They release huge energy
Explanation:
- B) ✔ Energy shakes buildings, land, and water.
Q95. During lightning, which type of electricity flows?
A) Static electricity discharge
B) Current from wires
C) Heat energy only
D) Solar electricity
✅ Correct Answer: A) Static electricity discharge
Explanation:
- A) ✔ Lightning is a massive static discharge.
Q96. The process of transfer of charge from a charged object to Earth is called:
A) Electromagnetism
B) Earthing
C) Lightning
D) Magnetisation
✅ Correct Answer: B) Earthing
Explanation:
- B) ✔ Earthing provides safe discharge of charges.
Q97. Which phenomenon is responsible for the working of an electroscope?
A) Heating effect of current
B) Like charges repel
C) Unlike charges attract
D) Magnetic effect
✅ Correct Answer: B) Like charges repel
Explanation:
- B) ✔ In electroscope, leaves diverge due to repulsion.
Q98. What should be done during an earthquake if you are driving?
A) Stop vehicle in open ground
B) Park near bridges
C) Park under flyover
D) Speed up to escape
✅ Correct Answer: A) Stop vehicle in open ground
Explanation:
- A) ✔ Open ground reduces danger from falling objects.
Q99. Which part of the Earth is divided into tectonic plates?
A) Inner core
B) Crust
C) Mantle
D) Outer core
✅ Correct Answer: B) Crust
Explanation:
- B) ✔ Earth’s crust is broken into tectonic plates.
Q100. Which of the following is a natural disaster caused by electrostatic discharge?
A) Earthquake
B) Cyclone
C) Lightning
D) Landslide
✅ Correct Answer: C) Lightning
Explanation:
- C) ✔ Lightning is an electrostatic discharge in nature.
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