Law and Theory
A Scientific Law is a description of a observation as opposed to a Scientific Theory which is an explanation of those observations. A good example of this is Gravity. Where in you have the law of Gravitation which states: any particle in the universe attracts any other particle with a force that is proportional to the product of the masses of the two particles and inversely proportional to the square of the distance between them. Then you also have the Theory of Relativity which explains the law of Gravitation.
Contrary to popular belief, a law is not superior to a theory. A theory will never be a law. Just as a description can never explain anything. If all we had were laws of science we would have a very well described universe but nothing would be explained.
- Wile, Dr. Jay L. Exploring Creation With Chemistry. Apologia Educational Ministries, Inc. 1998