Science is merely a description of the physical world. Just like a circuit diagram would describe the operation of a stereo, science describes the operation of nature. It's no more a faith than stereo instructions.
Science is based on observation of nature.
When our observations consistently contradict our ideas of how nature works, then we must revise our theories. In that sense, all of science is tentative. In principle, future observations could, and should, change our minds about the nature of the universe. Religious faiths, on the other hand, are not tentative, and claim to be the final answer. Thus, science is not a religious faith.