In real science the test is does it match reality as we observe it, does the predictions it makes turn out to be correct when we check them by experiment. The following clip highlights that fundamental idea.
In 'creationist science' all the answers have already been decided by the creationist interpretation of the bible, reality has to take a back seat to the religious dogma. This can be illustrated by the following web page
which contains the following quote
"However, when the interpretation of scientific data contradicts the true history of the world as revealed in the Bible, then it's the interpretation of the data that is at fault."
In other words when reality and the bible clash you ditch reality.