A solvent is a substance that dissolves other material e.g water is an excellent solvent

The substance that is dissolved by the solvent is called solute e.g sugar

The water is the solvent, the sugar is the solute and the two combined make a solution

Substances such as sugar or coffee are said to be soluble in water, however substances such as sand are said to be insoluble in water

A suspension is a mixture of a liquid and a finely divided insoluble solid e.g muddy water

A suspension if allowed to stand for a long period of time will lead to the suspended particles settling at the bottom of the container

To differentiate between a solution and a suspension remember a suspension is muddy and a solution is clear

A dilute solution contains a large amount of solvent relative to the small amount of solute 

A concentrated solution contains a large amount solute relative to the small amount of solvent

A saturated solution is one that contains as much dissolved solute as possible at a given temperature

The solubility of a substance  is the mass of it (in grams) that will dissolve in 100 grams of solvent at a fixed temperature

A solubility curve is a graph showing how th solubility of a substance varies with temperature