While I don't think I can improve on any answers already given (I'm much less eloquent and informed than others here), I'll take a crack at this. Will need to make a nice, hot cup of tea first.
1) Do you base your whole belief (or non-belief) system on Science? If so, why, instead of God?As has already been pointed out, science is not a belief system -- it's a tool for examining and learning about the material world. I can't say I have a belief system, other than I think "live and let live" is generally a good idea.
As to "why not God?", because gods are defined as supernatural and I see no reason to accept the hypothesis that the supernatural exists, particularly when even those who believe in it agree there's no evidence for it and there's no way of testing it to ever make it anything more than a wild guess.
2) Do you have any least favorite religions? Most favorite? No, they all seem much of a muchness to me. There's good and bad elements in all of them, and they all seem to go thru phases where one element predominates over the other.
3) Are there any Atheistic schools, the same way there are Christian schools?I've never heard of any. Altho I have heard of some atheist parents homeschooling because they object to Xtian influences in their local public schools.
4) Why did you become an Atheist? Or: What made you switch from being a Christian to being an Atheist?I didn't become an atheist so much as I finally realized I was one and that was why no religion ever "took" with me, despite my trying a few out.
5) Why do you think it’s a good idea to be an Atheist?I don't think it necessarily is, any more than it's necessarily a good idea to be a Xtian, or Muslim or any kind of whatever. I think it's a good idea to be a decent person, and whatever framework you want to use for that is fine.
6) Do you feel happier since you became an Atheist?Yes. More accurately, when I stopped trying to force religious beliefs on myself everything suddenly made sense and it makes me happy when things make sense.
7) If you are hungry you eat, and if you are thirsty you drink, but when you die, what is the solution to death?There is no "solution" to death. Death is not a problem -- it is, in balance with birth, an essential component of life. Life would not exist without death so taking it out of the equation does not seem to me like a good idea, even if it were possible.
If the resurrection (of Jesus) never happened, then why did the Apostles and many more Christians die for it?People martyr themselves for a lot of reasons. Look at Heaven's Gate, Jonestown or the Third Reich, come to that. A lot of people were willing to sacrifice their lives for them but that doesn't make those things good, or right, or true.
9) How would you explain a bacteria with a motorized flagella?Since I'm not a science type, I can't but I'm willing to bet real money you can find any number of books, or Google any number of sites, that can.
10) How would you explain the fact that humans are always seeking God?I read a book once called "Why God Won't Go Away: brain science and the biology of belief", by Andrew Newberg and Eugene D'Aquill, that had some very interesting ideas on this. I strongly suggest reading it, it's not a long book and is written for non-scientists.
As for myself, I don't explain it (tho I think Newberg and D'Aquill were onto something) I just know I don't seek any gods.
11) Why do you believe what you believe?Evidence in some cases, personal experience in others, and some things (like my family and friends loving me) I take on faith.
12) Do all Atheists believe in the Big Bang?I have no way of knowing that, but my guess would be that the answer is no.
13) If you believe in the Big Bang, why don’t you believe God caused it somehow?I have no idea whether the Big Bang happened or not, altho the evidence so far inclines me in it's favor. I don't think a god caused it because I've seen no evidence gods exist at all. Provide evidence for gods, or at least some very compelling reasons to believe without evidence, and I'll consider it.
14) Is there anything wrong with God? If so, how can you prove He is wrong?You mean aside from the whole no evidence thing?
15) What did you find to be more true about Atheism than Christianity?This really is not an answerable question because Xtianity and atheism aren't equivalent -- Xtiany is a claim that X is true, atheism is the opinion that the supernatural elements of this claim are not supported by evidence.
As far as the non-supernatural elements of Xtianity, I have no problem with most of them. Jesus, if he actually existed, had a fine and in many ways radical progressive philosophy -- at least if you ignore the contributions of Paul, which I do.
16) Do you think that any sort of eternal something must exist?I don't know, but I can't see any reason why it should other than the human fear of death and vanity in thinking we're essential enough to be immortal. Fear and vanity aren't compelling reasons to believe anything.
17) What do you feel is your purpose for living. Or: what is the purpose of your life?Can't say I have one, or feel that I need to have one. I just enjoy being alive and, like many, have enough empathy to want others to enjoy it too and if I can help with that, I will.
18) How would you respond if the Bible was shown to be historically accurate?I'm sure in some ways it is, but that no more validates its supernatural claims than the discovery of Troy validates the existence of the Greek gods.
19) Assuming you believe in evolution, what do you think caused us to evolve?That's what the theory of natural selection explains:
Darwin's Theory of Evolution by Natural Selection. Even in a Xtian school, you should be learning about this in biology class.
20) In light of the Big Bang, do you believe that the universe was created out of nothing?I have no idea. I'm not a scientist or anything close to it, and in any case the data on the Big Bang is still coming in.
21) Is there anything wrong anywhere? If so, how can we know unless there is a Moral Law?Check out a few books about social animals, particularly our nearest relatives, the chimps and bonobos. You'll find morality and rules of behavior did not start with us and are not exclusive to primates.
To answer the question more directly: there is morality because we create it.
22) Do Atheists ask for forgiveness?I don't know about all atheists, but I do. Just not of supernatural entities.
23) Why do you believe in the singularity if you have know idea what came before it, or how it was made?Can't answer science questions, but I'm certain there are others who can.
24) Why do you believe in evolution if you have no factual evidence that apes actually became human?Oh dear, you're not covering evolution at all in biology classes are you? Apes did not become human, we're members of the primate family, which includes apes. DNA is the evidence for this. It also helps that we can look at humans and other primates and see the obvious resemblance, just as we can look at zebras and other equines and see the obvious resemblance there.
25) What was it that told you that God is not real?I don't know whether or not the god hypothesis is true, I know that without evidence there's no reason for me to accept the claim that any kind of god is real. Come up with evidence (i.e., something that is observable, testable, repeatable and falsifiable) and we'll talk.
26) What standard of right and wrong do you hold to?I'd agree that the Golden Rule is a very good starting point.