...When you say you have faith in science, you mean only that you have confidence or trust that science can give good answers to questions about nature. But that confidence is not blind confidence - it is a deduction (or perhaps induction) based on the historical successes of science. In other words, it's an evidence-based expression of your confidence.
In contrast, when religious people talk about faith they mean believing something in the absence of what scientists would regard as good evidence. They talk about things like "the faith in things unseen", which boils down to believing that things are there even though there's no good evidence-based reason to do so. If they talk about faith as trust, again they don't mean an evidence-based trust. They mean something more along the lines of trusting in an imagined being that they "trust" exists, despite the lack of evidence.