In my Science classes (actually did this today) we start our unit on Evolution by 1st discussing what Science is, because there are many misconception.

Below is a summary:
* Science is 1 way of experiencing and understanding the world. There are others.
* All areas of study exist on a continuum from Less Scientific to More Scientific.
* There are other continuums as well (Art, History, Religion, etc).

Characteristics that make an area of Study MORE SCIENTIFIC
* Based on observations of the natural world (can be measured with the 5 senses in some way)
* Claims are testable and FALSIFIABLE.
* Evidence can support or refute a position but NEVER PROVE IT. Very common misconception science never PROVES. The best science can do is to support very strongly. Anyone who says science proves this or that is either misspeaking or does not understand what science does.
* Science is in a constant state of Change.
* If enough evidence contradicts a theory, the theory must be changed or replaced.