Well the radioactive decay is not quite so concrete as many people say, because there are many things that can affect the rate of decay. Also the way how the it is measured makes many assumption, such as that they know the exact amount of mother material that would have been at the site. No one would even know that, thus it is assumed.
Billion Fold acceleration demonstrated in the laboratory
ANDESITE FLOWS AT MT NGAURUHOE, NEW ZEALAND, AND THE IMPLICATIONS FOR POTASSIUM-ARGON "DATING"
These two quotes shows that everything is not quite right with traditional dating methods. Also with Radioactive decay, you get helium as a by product of the decay, but the amount of helium is not what you would expect for samples that have had billions of years. Whenever decay happens we get an alpha particle and that eventually turns into helium, thus helium is a good indicator of age because it can show how much helium is in the sample thus we get an age from it. The problem for Evolutionists is the fact that it does not give billions of year, but actually just a few thousand years, give or take a few thousand.
Nuclear Decay: Evidence for a Young Earth
The decay it at a diffusion rate that is about 100,000 times less than what it should be. For the data to be correct for evolutionist, then this is what would need to have happened to the samples.
So the results are a great confirmation for the belief in what the Bible says. For more info see this paper on the issue.
Helium Diffusion age of 6,00 Years
And there is some more evidence that they earth is young and that is our magnetic field. This theory about the beginnings of the solar systems magnetic fields is based on this verse.
2 Peter 3:5 For this they willingly are ignorant of, that by the word of God the heavens were of old, and the earth standing out of the water and in the water:
So a Physicist came up with a theory that the solar system was first formed out of water and then he made some assumptions that are found here.
The Creation of Planetary Magnetic Fields
Here are some things in the future that can test this theory to see if it is correct.
In fact we have been able to show that because Voyager has long been past those two planets and have been able to, and guess what? They supported the creationist model on the magnetic field.
Beyond Neptune: Voyager II supports Creation
There reason for all this evidence about the age of the Earth is that this is really the heart of the issue at hand. IS the Bible reliable in what is says? Because if the Bible is accurate and that there is scientific evidence to back it up regarding the age of the earth, then it is reliable in all thing, but if it is wrong in this, then it is wrong inall things and thus unreliable.
AN Old Age of the Earth is at the Heart of Evolution