An ignorant person who feels that the bible must be taken litteraly and any science that contradics what their book says (despite the fact there are different translations of the bible pointing to different things) is wrong. That would be all of science by the way. There is no science at all to suport their ignorant and idiotic claims.
A creationist will not accept the theory of evolution, despite it being fundemental to modern biology & genetics, and do not understand what theory means in scientific literature. They realy dont like this theory at all.
They normaly try to discrace 'evolutionists' and often attempt to imply that science can only be science if it is looked at from a religious perspective when quite the opposite is true. They accept a point and then ty and prove it, the opposite of the scientific method.
Finaly most know nothing about science and simply follow their faith. Many creationist leaders give themselves the title of Dr. Nearly all of these 'doctors' aquired their degrees from uncredited degree mills.
See www.talkorigins.com for a refutal of creationist claims.
Scientist: My evidence points to this conclusion therefor this conclusion is likely to be correct
Creationist: The bible says this happened, I'll try to prove it. Hmm no evidence. I better make some up....