1. What is the outermost layer of the Earth called?
Answer: b) Crust
2. The Earth's crust is primarily composed of which elements?
Answer: b) Silica and Aluminium (SiAl)
3. Which layer of the Earth is in a semi-molten (plastic) state?
Answer: b) Asthenosphere
4. The boundary between the crust and the mantle is called:
Answer: c) Mohorovičić Discontinuity
5. Which layer of the Earth is responsible for its magnetic field?
Answer: c) Outer Core
6. The inner core is in which state of matter?
Answer: c) Solid
7. What percentage of the Earth's volume does the mantle occupy?
Answer: d) 84%
8. The oceanic crust is primarily composed of:
Answer: b) Basalt
9. Which discontinuity separates the outer core from the inner core?
Answer: c) Lehmann
10. The lithosphere includes:
Answer: b) Crust and upper mantle
11. What is the point inside the Earth where an earthquake originates called?
Answer: b) Hypocenter/Focus
12. Which seismic waves are the fastest and can travel through all mediums?
Answer: a) P-waves
13. Which type of seismic wave causes the most destruction?
Answer: c) Surface waves (L-waves)
14. The instrument used to record earthquake waves is called:
Answer: b) Seismograph
15. The Richter Scale measures:
Answer: b) Magnitude of an earthquake
16. The Mercalli Scale measures:
Answer: b) Intensity
17. S-waves cannot travel through:
Answer: b) Liquids
18. The shadow zone is caused by the inability of which waves to travel through the outer core?
Answer: b) S-waves
19. Which waves create compression and rarefaction?
Answer: a) P-waves
20. The shadow zone covers approximately what percentage of the Earth's surface?
Answer: c) 40%
21. The lithosphere is divided into how many major tectonic plates?
Answer: b) 7
22. Which type of plate boundary is associated with the creation of new crust?
Answer: b) Divergent
23. What is the primary force behind plate movements?
Answer: b) Convection currents in the mantle
24. Which plate boundary is known as the "Ring of Fire"?
Answer: b) Convergent
25. At a transform boundary, plates:
Answer: c) Slide past each other
26. Subduction zones are associated with which type of boundary?
Answer: b) Convergent
27. Which of the following is a minor tectonic plate?
Answer: c) Juan de Fuca Plate
28. The Himalayan Mountains were formed due to the collision of which two plates?
Answer: b) Eurasian and Indian
29. Which boundary is also called a conservative boundary?
Answer: c) Transform
30. The Mid-Atlantic Ridge is an example of which type of boundary?
Answer: a) Divergent
31. Which discontinuity separates the mantle from the core?
Answer: b) Gutenberg
32. The asthenosphere is part of which layer?
Answer: b) Upper Mantle
33. Which discontinuity lies between the upper and lower mantle?
Answer: a) Repiti
34. Volcanoes are most commonly found at:
Answer: b) Convergent and divergent boundaries
35. The "Ring of Fire" is located around which ocean?
Answer: c) Pacific
36. Which seismic zone in India is the most hazardous?
Answer: c) Zone V
37. Zone V in India corresponds to which intensity on the Mercalli Scale?
Answer: b) IX and above
38. Approximately what percentage of India's land area is prone to seismic hazards?
Answer: d) 59%
39. Which zone is classified as a low-risk seismic zone in India?
Answer: b) Zone II
40. The 2002 seismic zone map of India categorizes regions into how many zones?
Answer: b) 4