SSC CGL Geography – Interior of the Earth & Rocks – Level 3 · Challenge
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46.60 + 27.72 = 74.32 ≈ 74%.
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SSC CGL Geography – Interior of the Earth & Rocks – Level 3 · Challenge – 8 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.
Statement-basedConsider:
I. The inner core is solid because of enormous pressure.
II. The Earth's magnetic field arises mainly in the outer core.
III. The mantle is completely liquid.
Which are correct?
I. The inner core is solid because of enormous pressure.
II. The Earth's magnetic field arises mainly in the outer core.
III. The mantle is completely liquid.
Which are correct?
Correct Answer: A [I and II only]
Explanation:
The mantle is solid (it only flows very slowly over long periods).
2.
Arrange in orderArrange in increasing order of density: inner core, crust, outer core, mantle
Correct Answer: B [Crust, Mantle, Outer core, Inner core]
Explanation:
Density rises with depth: crust ≈ 3, mantle ≈ 3.4 g/cm³, then the metallic core.
3.
Which pair is NOT correctly matched (mineral – use)?
Correct Answer: C [Olivine – asbestos industry]
Explanation:
Amphibole is linked with asbestos; olivine with jewellery.
4.
S-waves arrive 10 s after P-waves at a station. If P-waves travel at 8 km/s and S-waves at 4 km/s, the distance of the earthquake is:
Correct Answer: B [80 km]
Explanation:
d = 10 × 8 × 4 ÷ (8 − 4) = 80 km.
5.
Which is a basic, fine-grained, extrusive igneous rock?
Correct Answer: A [Basalt]
Explanation:
Granite: acid + coarse; gabbro: basic but coarse; rhyolite: fine but acid.
6.
Assertion–Reason
A: Sedimentary rocks are the main source of coal and petroleum.
R: Sedimentary rocks are formed by the cooling of magma.
A: Sedimentary rocks are the main source of coal and petroleum.
R: Sedimentary rocks are formed by the cooling of magma.
Correct Answer: D [A is true but R is false]
Explanation:
Cooling of magma forms igneous rocks; sedimentary rocks form from deposited sediments.
7.
Which statement about the lithosphere is correct?
Correct Answer: C [It is the crust plus the uppermost mantle, broken into plates]
Explanation:
Lithosphere = rigid crust + top of the mantle, 10–200 km thick.
8.
Data tableOxygen 46.60%, Silicon 27.72%, Aluminium 8.13%, Iron 5.00% of the crust by weight. Oxygen and silicon together form about:
Correct Answer: A [74%]
Explanation:
46.60 + 27.72 = 74.32 ≈ 74%.
➤ 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
📘 TNPSC பொது அறிவு அலகு II — இந்தியாவின் புவியியல் (Geography of India) – முழுமையான பாடநூல்
Here you get the answer with a one-line explanation. TNPSC பொது அறிவு அலகு II இந்தியப் புவியியல் முழுவதும் · 14 அத்தியாயங்கள் · 340 பயிற்சி வினாக்கள் விளக்கத்துடன் · 2 மாதிரித் தேர்வுகள் (100 வினாக்கள்) · வரைபடங்கள், 14 மனவரைபடங்கள் · ஒவ்வோர் அத்தியாயத்திலும் தமிழ்நாடு பார்வை
Get the book – ₹299 More quizzes
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