Why creationism is not a science
Science essentially means doubt, it is a process of continual questioning, of testing new ideas to further knowledge on any given subject, then coming to a provisional conclusion. Proper science always leaves its ideas open to further research, and takes nothing as an ultimate Truth - all laws of nature are open to revision, all physics is constantly being re-thought, nothing is taken as gospel.
This is why creationism is not, and can never be, a science: its very basis is unscientific, in that it starts from a given invariable - the word of the Bible. If that part of the process is made unquestionable, then it is fraudulent to claim it as a science.
Of course, if creationism allowed the authority of the Bible to be questioned scientifically, it would immediately be revealed as nothing but primitive mumbo-jumbo, and this is why the fundamentalists have to try to denigrate real science, watering it down with their own pseudo-scientific charlatanism.
Science asks, creationism dictates.