Damn good points, Big RR. The fundamental difference, for me, is this.
The teachings of science may be validated in many ways by many people. If a belief/law/theory is found to be lacking by anyone, the whole community of science is generally excited and ready to understand new concepts and find a new truth that better explains things.
Compare to religion - founded on a single book. This book was
1. written something like 1600 years ago
2. written 400 years after any alleged "facts"
3. heavily edited by some bloke for his own purposes (Emperor Constantine who threw out most of the original Gospels)
4. heavily modified, added to, subtracted from ever since by various people
My experience has been there is no willingness to be proved wrong or accept new concepts (mainly because after 1600 years with a single resource, there are no new concepts likely to emerge).
I believe in science because it is progressive. If a scientist told me some "law" of physics, and said that though I couldn't see or verify it, this "law" was true because he had found a thousand year old book that said it was, I'd treat him with the same disbelief I treat the bible. It is well possible other books with similar stories to those found in the bible would be around today had not their authors been burnt at the stake as heretics. Let's not forget that the bible is a collection of stories found in much older texts.
Big RR wrote:Religious faith takes this another step; it is faith in something the believer knows can never be fully proven
"Fully" proven? Or proven in any way, shape or form?
For me, there are three types of "truth".
1. Things I can experience and see, such as gravity. I have an understanding of them (I studied physics at university) and, although I have not proven the maths, I put a high enough probability on the truth being right that I can accept it as fact.
2. Things that I can't see or experience but have on "good authority" that they exist. Things like black holes and the assertion that "lava spews out of volcanoes". I haven't actually seen or experienced either but many reputable sources have told me so, they are open to contradiction and open to being corrected. I can put a high enough probability on the truth being right that I can accept it as fact.
3.Things that I can't see or experience and have no reason to believe in the things' existance. No preacher can tell me in any authoritative sense (to my mind) that a god exists because they will simply be repeating what they have been told - told by someone who was themselves told. No new evidence. No openness to contradiction (though some are happy to debate theological and atheological issues). There is simply no reason TO believe them.
Big RR wrote:We take much on faith
We do. Absolutely. The fundamental difference is that if a scientist speaks about things that are not actually true, they will soon be shot down (not literally, of course

) and proven wrong. They have to provide evidence and back it up or they will rightly be treated by scepticism at best. If a preacher speaks of their religion, they do not need to back it up with any proof or evidence.
Of course, the vast majority of Religious people are decent, honest people (as are the vast majority of non religious people of course). They have their beliefs which gives them comfort. Great for them. Of course - when they call on people's doors and go "bible thumping", well ...

If a man speaks in the forest and there are no women around to hear is he still wrong?