Some Natural Phenomena Part 2: MCQs (Q26–Q50)
🌩️ Some Natural Phenomena – MCQs for Class 8 Science
Part 2: Q26–Q50
Q26. A device used to protect electrical appliances from lightning is:
A) Fuse
B) Generator
C) Lightning conductor
D) Transformer
✅ Correct Answer: C) Lightning conductor
Explanation:
- A) Fuse protects appliances from overcurrent.
- B, D) Not for lightning.
- C) ✔ A lightning conductor directs the charge safely to the ground.
Q27. Which type of charges are produced by rubbing?
A) Current charges
B) Static charges
C) Neutral charges
D) Magnetic charges
✅ Correct Answer: B) Static charges
Explanation:
- B) ✔ Frictional electricity produces static charges.
Q28. Which of the following is a good conductor of electricity?
A) Glass
B) Rubber
C) Copper
D) Plastic
✅ Correct Answer: C) Copper
Explanation:
- C) ✔ Metals like copper allow current to flow easily.
Q29. The destructive energy of an earthquake is measured on:
A) Richter scale
B) Celsius scale
C) Kelvin scale
D) Hertz scale
✅ Correct Answer: A) Richter scale
Explanation:
- A) ✔ Richter scale measures magnitude of earthquakes.
Q30. Which type of charges attract each other?
A) Like charges
B) Unlike charges
C) Neutral charges
D) None
✅ Correct Answer: B) Unlike charges
Explanation:
- B) ✔ Positive attracts negative → basic electrostatic law.
Q31. Earthquakes are most frequent in:
A) Coastal plains
B) Mountain regions
C) Deserts
D) Islands only
✅ Correct Answer: B) Mountain regions
Explanation:
- B) ✔ Mountainous/plate boundaries experience tectonic activity.
Q32. Which of these is NOT a precaution during an earthquake?
A) Take shelter under a strong table
B) Stand near tall buildings
C) Stay in open ground
D) Stay away from glass windows
✅ Correct Answer: B) Stand near tall buildings
Explanation:
- B) ✔ Tall buildings may collapse → unsafe.
Q33. When a plastic comb is rubbed with dry hair, it attracts bits of paper because of:
A) Magnetic force
B) Static electricity
C) Gravity
D) Current electricity
✅ Correct Answer: B) Static electricity
Explanation:
- B) ✔ Comb gets charged → electrostatic attraction.
Q34. The layer of Earth where tectonic plates float is:
A) Crust
B) Mantle
C) Outer core
D) Inner core
✅ Correct Answer: B) Mantle
Explanation:
- B) ✔ Plates float on semi-molten upper mantle (asthenosphere).
Q35. Which one is the outermost layer of the Earth?
A) Mantle
B) Crust
C) Core
D) Lithosphere
✅ Correct Answer: B) Crust
Explanation:
- B) ✔ Earth’s crust = outermost solid shell.
Q36. Lightning is an example of:
A) Current electricity
B) Static electricity discharge
C) Magnetic effect
D) Heat effect
✅ Correct Answer: B) Static electricity discharge
Explanation:
- B) ✔ Lightning = sudden discharge of accumulated static charges in clouds.
Q37. Which of these can cause an earthquake?
A) Volcanic eruption
B) Movement of plates
C) Human activities (dams, mining)
D) All of these
✅ Correct Answer: D) All of these
Explanation:
- D) ✔ Earthquakes can be triggered by all listed causes.
Q38. The seismic waves recorded by a seismograph are shown on a:
A) Richter graph
B) Seismogram
C) Tectonic chart
D) Earthquake map
✅ Correct Answer: B) Seismogram
Explanation:
- B) ✔ A seismogram records the vibrations of seismic waves.
Q39. Which of the following is NOT a consequence of earthquakes?
A) Tsunamis
B) Landslides
C) Lightning
D) Building collapse
✅ Correct Answer: C) Lightning
Explanation:
- C) ✔ Lightning is not related to earthquakes.
Q40. Which type of charges flow in a conductor?
A) Positive charges
B) Negative charges (electrons)
C) Neutrons
D) Protons
✅ Correct Answer: B) Negative charges (electrons)
Explanation:
- B) ✔ In metals, conduction is by free electrons.
Q41. The point of origin of an earthquake inside Earth is:
A) Epicentre
B) Focus
C) Seismic zone
D) Fault line
✅ Correct Answer: B) Focus
Explanation:
- B) ✔ Earthquake originates at focus inside Earth.
Q42. The energy released during an earthquake comes from:
A) Sun
B) Movement of plates
C) Moon
D) Lightning
✅ Correct Answer: B) Movement of plates
Explanation:
- B) ✔ Stored elastic energy in tectonic plates is suddenly released.
Q43. Which natural disaster is associated with aftershocks?
A) Cyclone
B) Tsunami
C) Earthquake
D) Volcanic eruption
✅ Correct Answer: C) Earthquake
Explanation:
- C) ✔ Smaller tremors after the main quake = aftershocks.
Q44. A lightning conductor works on the principle of:
A) Repulsion of charges
B) Neutralization of charges
C) Accumulation of charges
D) Conduction of heat
✅ Correct Answer: B) Neutralization of charges
Explanation:
- B) ✔ Provides safe path to neutralize electric charges into Earth.
Q45. Which one is a man-made cause of earthquakes?
A) Tidal waves
B) Reservoir-induced seismicity (big dams)
C) Cyclones
D) Rainfall
✅ Correct Answer: B) Reservoir-induced seismicity (big dams)
Explanation:
- B) ✔ Human-made reservoirs can trigger seismic activity.
Q46. Which type of charges repel each other?
A) Like charges
B) Unlike charges
C) Positive and negative
D) None
✅ Correct Answer: A) Like charges
Explanation:
- A) ✔ Positive–positive or negative–negative repel.
Q47. The main cause of lightning is:
A) Friction between tectonic plates
B) Charge separation in clouds
C) Earth’s magnetism
D) Solar activity
✅ Correct Answer: B) Charge separation in clouds
Explanation:
- B) ✔ Lightning occurs due to charge separation during cloud formation.
Q48. Which one of these is a precaution during lightning?
A) Stand under a tree
B) Switch off electrical appliances
C) Use mobile phones in open fields
D) Take a bath outdoors
✅ Correct Answer: B) Switch off electrical appliances
Explanation:
- B) ✔ Electrical appliances can get damaged → safer to switch off.
Q49. An earthquake-resistant building should have:
A) Heavy roof
B) Weak foundation
C) Flexible and light construction
D) Very tall pillars
✅ Correct Answer: C) Flexible and light construction
Explanation:
- C) ✔ Flexibility allows it to absorb shocks.
Q50. The sudden shaking of the Earth’s surface is called:
A) Cyclone
B) Earthquake
C) Volcano
D) Flood
✅ Correct Answer: B) Earthquake
Explanation:
- B) ✔ Definition of earthquake.
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