SSC CGL Geography – Interior of the Earth & Rocks – Level 1 · Warm-up · Tier I Level

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SSC CGL Geography – Interior of the Earth & Rocks – Level 1 · Warm-up · Tier I Level – 12 questions, subject: Geography – India & World. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.

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1.  
The outermost solid layer of the Earth is the:

Correct Answer: A [Crust]

Explanation:

Crust → mantle → core, from outside in.

2.  
The Earth's core is made mainly of:

Correct Answer: D [nickel and iron]

Explanation:

Core = NIFE (nickel + iron).

3.  
The most abundant element in the Earth's crust (by weight) is:

Correct Answer: C [Oxygen]

Explanation:

O 46.60% > Si 27.72%.

4.  
Which earthquake waves arrive last at a station but are the most destructive?

Correct Answer: B [Surface waves]

Explanation:

Surface (L) waves travel only near the surface, are the slowest and arrive last, but do the most damage to buildings.

5.  
Quartzite is the metamorphic form of:

Correct Answer: C [Sandstone]

Explanation:

Sandstone → quartzite (both quartz-rich).

6.  
Granite is a/an:

Correct Answer: A [igneous rock]

Explanation:

Coarse-grained rock from slowly cooled magma (intrusive igneous).

7.  
Fossils are most commonly found in:

Correct Answer: B [sedimentary rocks]

Explanation:

Fossil Finder: remains are buried in layers of sediment.

8.  
The hardest natural mineral on the Mohs scale is:

Correct Answer: D [Diamond]

Explanation:

Diamond = 10, the top of the scale.

9.  
The Lehmann discontinuity separates the:

Correct Answer: D [outer core and inner core]

Explanation:

Moho = crust–mantle boundary.

10.  
Fill in the blankThe Gutenberg discontinuity lies at a depth of about ____ km.

Correct Answer: A [2,900]

Explanation:

Mantle–core boundary ≈ 2,900 km.

11.  
Sand is made mostly of the mineral:

Correct Answer: B [Quartz]

Explanation:

Quartz is the main mineral of sand and granite.

12.  
One-line recallthe volcanic rock that can float on water is:

Correct Answer: C [Pumice]

Explanation:

Pumice is full of gas holes, so it is lighter than water.

➤ Full notes, shortcuts and every answer explained – SSC CGL 2026 Geography – India & World book (₹149): www.shanmugamiasacademy.in/study-materials/ssc-cgl-geography-india-world

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