I've heard this argument too many times to count. That science's "faith" in it's theories are just as blind as religious "faiths". This is simply not true.
Secondly, and most importantly, theories are tested, repeatedly, in as many ways as logically possible. And if they are wrong, they are thrown out.
This is the biggest difference between major religious faiths and science. Science is willing to admit what it doesn't know, and it is willing to admit it was wrong if evidence contradicts a scientific theory.
Religious faiths have decided on their view of reality, and fight to preserve it contrary to evidence. The earth is not 6000 years old. The earth was not created in 7 days. Science does not rely on faith.