They can be solutions or suspensions.
Yes, a chemical change makes anything into one or more substances. In a chemical change the the matter can change.
that's an alloy
compound
Compounds / molecules
mixture
This is a mixture.
A mixture.
an element
A mixture.
Yes
A heterogeneous mixture is one that consists of two or more substances.
A MIXTURE is matter made up of two or more substances that are combined physically, but keep their individual properties.