16 October 2026: rocks, ecology, sound and heritage quiz

Molten material cooling and solidifying — Igneous rocks form when molten material cools and solidifies; sedimentary formation involves deposition.

Limestone to marble — NCERT gives limestone changing into marble under heat and pressure as an example of metamorphism.

Grasshopper — Grass is the producer. The herbivore feeding on it is the primary consumer in this illustrative chain.

One organism has several feeding connections — A food web connects multiple feeding pathways, rather than showing only one sequence.

Different loudness — Amplitude is associated with loudness. Equal frequency does not by itself indicate a pitch difference.

It needs a material medium — NCERT states that sound needs a material medium and cannot propagate through a vacuum.

Karnataka—Vijayanagara capital in the Tungabhadra basin — UNESCO identifies Hampi with the Vijayanagara capital in Karnataka’s Tungabhadra basin.

Its remains include royal, civic, defensive and water structures — The World Heritage account describes a broad urban ensemble, including sacred and secular structures.

Its inscription on the World Heritage List — 1983 is the modern inscription year, distinct from the ancient phases of cave construction and art.

A monastery — The account distinguishes viharas or monasteries from chaityagrihas or sanctuary halls.