Structure of the Atom — Science STD 9 — Question

Loudness of sound depends on _____.

Cardiac muscles seldom get fatigued because _________. (of continuous contraction, of extreme endurance, they lack mitochondria)

64g of oxygen gas contains _________ Moles of oxygen atoms.

When light passes through water with milk, it shows a bluish tinge due to Scattering, and the phenomenon is called ________. (Tyndall effect, Brownian motion, Refraction)

If a mixture contains iron filings, it can be separated by using a ________. (Magnet, Filtration, Distillation)

Gases can be liquefied by applying ________ and lowering _________.

When the frequency of the sound is increased, the wavelength ______.

Music is a sound of rich __________. (Rhythm, Pitch, Noise)

Energy changes occur during ________ change. (Physical, Chemical, Temporary)