E-STAR - Student

A substance is a form of matter possessing constant properties under specific conditions.
Properties of substances are subdivided into physical and chemical properties.
Physical properties of a substance describe the characteristics of the substance that are related to physical changes.
Substances can be identified based on their physical properties such as state, color, odor, taste, hardness, density, melting and boiling points.
A mixture is a substance which consists of two or more pure substances that are mixed together physically.
Mixtures are classified into homogeneous and heterogeneous mixtures
Substances undergo two types of changes: physical and chemical changes.
Physical changes are changes that do not result in the formation of new substances with new properties.
Chemical changes are the changes in the composition of substances.
Mixtures can be separated into their components using different methods such as magnetic separation, filtration, decantation, evaporation and distillation.