Similarities between solution and emulsion.

As far as being similar, both are types of solutions.  A solution is a mixture that has a small part (solute) being dissolved in a larger part (solvent).  Dissolving sugar in water is a good example of a solution.  We say the sugar molecules have been dissolved amongst the water molecules.  An emulsion is a mixture of two substances that may be forced to intermingle with each other, but eventually will separate.  A good example here would be oil and water.  The less dense oil will usually separate from the more dense water.  One may shake the container the two are in and the oil and water will mix together.  But the longer the container sits, the more the oil and water separate.  The two liquids are said to be immiscible, meaning they will not stay mixed with each other.