There IS a God, there is NO RELIGION
Creationism is another theory for the existence of humans.   It's what's called a self supporting theory (also known as a 'silly' or 'bizarre' theory) because it violates just about all the principles of scientific theory in that it states, generally, that the Answer (God created man) is known and cast in concrete and not subject to question or challenge.  

Creationism uses the Bible for it's primary support, although they do reach into the source documentation for the Bible to further support it ...   it's just that with the answer already determined, Creationists have a MUCH harder time encompassing all known facts when no fact may be allowed to affect the final answer.  

For this reason, Creationism is not a scientific theory, but really a belief system, not terribly unlike the belief that flying monkeys are going to shoot from Madonna's butt one day.  

Believers in Creationism are called Creationists (also 'closed minded people', 'religious fanatics' and 'idiots').   You can often tell them while driving because they adorn their cars with such things as bumper stickers that read "God said it, I believe it, that settles it" or the sign of the Christian Fish eating a similar, smaller sign labeled Darwin.   For related reasons, they are often found driving the wrong way on ONE WAY streets.