Rocks, Minerals & Landforms MCQs with Answers

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Sea water is the most suitable medium for fossilization because marine environments provide rapid burial by sediments, low oxygen conditions, and mineral-rich water that promote preservation.

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The diameter of a pearl typically ranges from 2mm to 15mm.

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Remains or relics of any organism are declared as fossils if they lived before 15,000 years ago.

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Fossilization is favoured by small size and abundance of organisms, as these traits increase the likelihood of burial and preservation.

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Melted rock beneath the Earth's surface is called magma, and it becomes lava only after it erupts onto the surface.

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Onyx is a kind of marble, specifically a banded variety of chalcedony that is often used as an ornamental stone.

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The change in moisture content of soils changes the soil temperature, soil structure, and soil microbial activity — All of these.

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Shale is studied by a Geologist, just as Fossils are studied by a Paleontologist.

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The chemical formula of quartz is SiO₂ (silicon dioxide).

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The purest form of coal is Anthracite, which contains the highest carbon content (about 86–97%).