Most people think that scientists can actually measure the ages of rocks, using a method called “radiometric” or “radioisotope” dating.
More often, rocks are “dated” by the fossils they contain, based on a pre-existing belief in evolution.
After all, the scientists haven’t been around that long, have they?
There are a variety of different ways to figure out how old an object is.
However, even if we measured how much of A and B were in a sample of rock, could we figure out how long A has been changing into B, and therefore how old the rock is? We don’t know what the rock was like when it formed, or what has happened to it since. All of these factors will affect how “old” the rock appears—in practice, usually making it appear a lot older than it really is.
To test this method, some scientists gathered samples from hardened lava at Mount St Helens, which erupted most recently in the early 1980s.
The samples, which came from rocks that formed between 19, were sent to a lab and were “dated” using the potassium-argon (K-Ar) method.
Of course, the best method is to check the account of a reliable eyewitness, if one is available. Since it is the written Word of God, we can trust it to tell us the truth about the past.
Carefully studying the Biblical record, we find that the universe has an age of around 6,000 years, and that a world-changing, global Flood occurred about 4,300 years ago.