There is an obvious answer to that: Newton's laws match our observations of reality, ignoring relativistic effects. Scripture is written by someone to reflect their opinions. They often have truths in them, but they're just a story. They don't reflect reality any more than Harry Potter does.

To answer your second question: science is not based on a god or gods. Scientific thinking often branched out of religion, but they're separate now and have been for hundreds, if not thousands, of years. And science branched off from many different religions, just not the Christian one you seem to believe in.