Earth Lithosphere (Rocks) – Best 20+ MCQs for Competitive Exams
1. In earth Lithosphere, Artesian wells are found in ____.
Correct Answer: B. Sedimentary rocks
Explanation: Sedimentary rocks have porous layers that allow water to flow under pressure, forming artesian wells.
2. Sedimentary rocks are formed by the process of:
Correct Answer: B. Deposition
Explanation: Sedimentary rocks form when sediments are deposited, compacted, and cemented over time.
3. In earth Lithosphere, Sandstone belongs to _____.
Correct Answer: A. Arenaceous rocks
Explanation: Sandstone is an arenaceous rock composed mainly of sand-sized mineral particles.
4. In which type of rocks are coal and petroleum found?
Correct Answer: C. Sedimentary
Explanation: Coal and petroleum are formed from organic remains preserved in sedimentary rocks.
5. In earth lithosphere, Grit is another name for _____.
Correct Answer: B. Sandstone
Explanation: Grit is a coarse-grained variety of sandstone made up of large sand particles.
6. The uppermost portion of the earth is called the crust or ______.
Correct Answer: C. Lithosphere
Explanation: The lithosphere includes the Earth’s crust and the uppermost mantle.
7. Which one of the following is not a sedimentary rock?
Correct Answer: A. Marble
Explanation: Marble is a metamorphic rock formed from limestone.
8. Which metal is most abundant in the earth’s crust?
Correct Answer: C. Aluminium
Explanation: Aluminium is the most abundant metal in the Earth’s crust.
9. Which of the following rocks is transformed into marble?
Correct Answer: A. Limestone
Explanation: Limestone changes into marble under high temperature and pressure.
10. Which of the following is a metamorphic rock?
Correct Answer: A. Slate
Explanation: Slate is a metamorphic rock formed from shale.
11. Artesian wells are formed in _____.
Correct Answer: B. Aquifer rocks
Explanation: Artesian wells are formed in aquifer rocks where water is confined under pressure between impermeable layers.
12. Earth’s crust below the oceans is composed of:
Correct Answer: A. Igneous rocks
Explanation: The oceanic crust is mainly composed of igneous rocks such as basalt.
13. In which type of rocks are metals like gold and copper mostly found?
Correct Answer: B. Old igneous
Explanation: Metals like gold and copper are mostly found in old igneous rocks.
14. Dolerite is an example of:
Correct Answer: A. Dyke
Explanation: Dolerite commonly occurs as a dyke, a vertical or steeply inclined igneous intrusion.
15. Which of the following is an argillaceous rock?
Correct Answer: A. Shale
Explanation: Shale is an argillaceous rock rich in clay minerals.
16. Coal is an example of:
Correct Answer: A. Sedimentary rocks
Explanation: Coal is a sedimentary rock formed from compressed plant remains.
17. Rocks which are formed by the solidification of lava, are:
Correct Answer: A. Basalts
Explanation: Basalts are extrusive igneous rocks formed from lava.
18. The lightest layer of the earth is:
Correct Answer: C. Sial
Explanation: Sial is the lightest layer due to high silica and aluminium content.
19. The core of the earth is also known as:
Correct Answer: B. Barysphere
Explanation: The barysphere refers to the dense core of the Earth rich in iron and nickel.
20. Which of the following rocks is the metamorphic equivalent of sandstone?
Correct Answer: B. Quartzite
Explanation: Quartzite is formed when sandstone undergoes metamorphism.
21. What is anthracite?
Correct Answer: C. A hard shiny black coal
Explanation: Anthracite is a hard, shiny black coal with high carbon content.
22. Which of the following layers of the earth is believed to have the heaviest mineral materials of highest density?
Correct Answer: A. Central core
Explanation: The central core contains the heaviest minerals, mainly iron and nickel, with the highest density.
23. What percentage of the Earth’s total mass does the lithosphere account for?
Correct Answer: B. 16%
Explanation: The lithosphere, comprising the crust and uppermost mantle, accounts for roughly 16% of Earth’s total mass.
24. Approximately how thick is the lithosphere?
Correct Answer: A. 1,800 miles
Explanation: The lithosphere is about 1,800 miles thick, including the crust and upper mantle.
25. Which two layers of the Earth primarily make up the lithosphere?
Correct Answer: B. Mantle and crust
Explanation: The lithosphere consists of the crust and the uppermost solid part of the mantle.
The lithosphere (rocks) is one of the four primary components of the Earth’s spheres: the atmosphere (air), biosphere (life), hydrosphere (water), and lithosphere (rocks). In competitive examinations, examiners frequently assess candidates’ knowledge of geology in general science section, where the lithosphere constitutes one of the fundamental topics. It has been observed that geology-related questions—particularly those concerning the lithosphere—are commonly asked in exams conducted by FPSC, SPSC, BPSC, KPPSC, PTS, OTS, STS, NTS, and even UPSC. In light of this, our team has compiled a comprehensive set of multiple-choice questions (MCQs) on the lithosphere to assist our users in their exam preparation.