Question

what is density ?
in chapter matter in our surrounding​

Answer 1

Density is a measure of mass per unit of volume. ... The average density of an object equals its total mass divided by its total volume. An object made from a comparatively dense material (such as iron) will have less volume than an object of equal mass made from some less dense substance

Answer 2

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The mass per unit volume of a substance is called density (density = mass/volume). As thevolume of a substance increases, its densitydecreases. Though ice is a solid, it has large number of empty spaces between its particles.