A mixture where the composition is constant throughout.

A mixture where the individual substance remains distinct 

A pure substance that cannot be separated into a simplier substance

a thing that is composed of two or more separate elements; a mixture.

Any property used to characterize matter and energy and their interactions

Alters a substance without changing its compitision 

a property used to characterize materials in reactions that change their identity

One or more substance change to create a new substance with different props