| A | B |
|---|
| soluble | if a material does dissolve |
| insoluble | if a material does not dissolve |
| dissolve | when a substance is broken down by a solvent |
| solution | a dissolved mixture of two or more substances |
| solute | substance which will dissolve |
| solvent | substance which causes a material to dissolve |
| residue | tiny undissolved particles |
| evaporation | when molecules of a liquid gain enough energy to become a gas |
| condensation | when cooling molecules of a gas loose energy and become a liquid |
| filter | when a mixture is passed through a fine paper/fabric to remove undissolved particles |
| molecules | combinations of atoms |
| particles | tiny pieces of a substance |
| irreversible change | when substances are changed and cannot be changed back, e.g. burning |
| reversible change | when substances are changed, but can be changed back, e.g. melting |
| chemical reaction | when molecules of a mixture are permanently changed, i.e. old bonds broken and new bonds formed |
| materials | term usually used to refer to any solid matter, e.g. wood |
| substances | term usually used to refer to any non-solid matter, e.g. air |
| properties | different characteristics of materials and substances, e.g. flexibility and viscosity |
