Welcome to the forums.
The only thing binding Atheists, is the lack of belief in gods. You've probably noticed by now, that morality isn't based on "holy books" but simply a basic requirement to survive as a social species. This has also been shown to be evolutionary. In fact, when I was in High School and read the bible and not just the parts I was 'supposed to' I found the "absolute morals" of the bible abhorrent.
Also regarding the sciences and the bible: Genesis 1, the 6 days of creation are so far removed from reality, the only way it can work is via "magic." The solid dome holding up an ocean of water our rockets do not hit or pass thru when going to orbit should be proof enough. However, there are just some people that believe that the Earth is flat, even if you show them a world of proof and evidence, they still will not accept reality. Ultimately, this is something you must be able to accept with theists. There are just some that no matter what you say or do, you or anyone else will not be able to convince them. Some of your friends may come around, but others will not. I'm letting you know this, incase you didn't already know, so you don't get discouraged the times when you do fail.