Earthquakes MCQs Class 8 Science
Earthquakes MCQs – CBSE Class 8 Science
Class: 8
Subject: Science
Section: Some Natural Phenomena
Topic: Earthquakes MCQs
Board: CBSE (Based on NCERT Syllabus)
Subject: Science
Section: Some Natural Phenomena
Topic: Earthquakes MCQs
Board: CBSE (Based on NCERT Syllabus)
1. An earthquake is caused by:
Answer: b) Movement of tectonic plates
Explanation: Earthquakes occur due to sudden movement of Earth’s crustal plates, releasing large amounts of energy.
Explanation: Earthquakes occur due to sudden movement of Earth’s crustal plates, releasing large amounts of energy.
2. The instrument used to record earthquakes is:
Answer: b) Seismograph
Explanation: A seismograph records seismic waves produced during an earthquake.
Explanation: A seismograph records seismic waves produced during an earthquake.
3. The point inside Earth where earthquake originates is:
Answer: b) Focus
Explanation: The focus is the origin point of seismic waves beneath Earth’s surface.
Explanation: The focus is the origin point of seismic waves beneath Earth’s surface.
4. The point on Earth’s surface directly above focus is:
Answer: a) Epicentre
Explanation: Maximum damage usually occurs near the epicentre.
Explanation: Maximum damage usually occurs near the epicentre.
5. Earthquake magnitude is measured on:
Answer: b) Richter scale
Explanation: It measures the energy released during an earthquake.
Explanation: It measures the energy released during an earthquake.
6. Seismic waves are:
Answer: b) Energy waves from earthquakes
Explanation: They travel through Earth carrying released energy.
Explanation: They travel through Earth carrying released energy.
7. Areas prone to earthquakes are called:
Answer: b) Seismic zones
Explanation: These regions experience frequent earthquakes.
Explanation: These regions experience frequent earthquakes.
8. Tremors are:
Answer: b) Mild earthquakes
Explanation: Small shaking of Earth’s surface is called tremor.
Explanation: Small shaking of Earth’s surface is called tremor.
9. Safe action during earthquake:
Answer: c) Take cover under table
Explanation: Protects from falling debris.
Explanation: Protects from falling debris.
10. Earth’s crust is divided into:
Answer: a) Plates
Explanation: These tectonic plates move slowly causing earthquakes.
Explanation: These tectonic plates move slowly causing earthquakes.
11. Sudden shaking of Earth is:
Answer: b) Earthquake
Release of underground energy.
Release of underground energy.
12. Major cause of damage:
Answer: b) Building collapse
Poor construction increases damage.
Poor construction increases damage.
13. Earthquake under sea causes:
Answer: b) Tsunami
Large sea waves triggered by quakes.
Large sea waves triggered by quakes.
14. Plates float on:
Answer: b) Mantle
Semi‑molten layer supports plates.
Semi‑molten layer supports plates.
15. First recorded by:
Answer: a) Seismograph
Detects vibrations.
Detects vibrations.
16. Aftershocks are:
Answer: b) Smaller quakes after main shock
Occur as crust readjusts.
Occur as crust readjusts.
17. India lies in:
Answer: a) High seismic zone
Himalayan region is quake‑prone.
Himalayan region is quake‑prone.
18. Open ground is safe because:
Answer: a) No buildings fall
Avoids debris injury.
Avoids debris injury.
19. Faults are:
Answer: a) Cracks in crust
Movement along faults causes quakes.
Movement along faults causes quakes.
20. Best prevention method:
Answer: a) Earthquake‑resistant buildings
Engineering design reduces damage.
Engineering design reduces damage.
