There are three known phases, or states, of matter: solids, liquids, gases. In a solid, constituent particles (ions, atoms, or molecules)
Transformation of a substance which results in a completely different kind of product is called a chemical
A transformation in which particles of the matter do not undergo any change is called a physical change.
Things around us are made of a large variety of materials. Classification of materials or things is useful for
The substance or components in the mixture may be undesirable or even harmful to human health.