Something for Young Earth Creationists to consider:

Nowhere in the Bible is the age of the Earth mentioned. Not 6,000 years, not 10,000 years.
There's is no mention at all.
That young age comes from a MAN; A fallible, mortal man called Bishop Usher who did what he reckoned were some good calculations to get it.

So when you're saying that science like evolution, geology or physics cannot disprove God's word...remember that the age of the earth is NOT God's word. It's MAN's word.