Carbon has a weight of twelve atomic mass units (AMUs), and is the building block of all organic matter (plants and animals).A small percentage of carbon atoms have an atomic weight of 14 AMUs. Carbon-14 is an unstable, radioactive isotope of carbon 12.
The carbon-14 dioxide is utilized by plants in the same way normal carbon dioxide is.In fact, changing the environments surrounding the samples can alter decay rates.The second faulty assumption is that the rate of carbon-14 formation has remained constant over the years.That means if you took one pound of 100 percent carbon-14, in 5,730 years, you would only have half a pound left.Carbon-14 is created in the upper atmosphere as nitrogen atoms are bombarded by cosmic radiation.In addition to the reasons mentioned in the previous paragraph, the flood provides another evidence that this is a faulty assumption.
During the flood, subterranean water chambers that were under great pressure would have been breached.
This would have resulted in an enormous amount of carbon-12 being released into the oceans and atmosphere.
The effect would be not unlike opening a can of soda and having the carbon dioxide fizzing out.
As scientists will often claim something to be millions or billions of years old (ages that do not conform to the Biblical account of the age of the earth), Christians are often left wondering about the accuracy of the carbon-14 method.
The truth is, carbon-14 dating (or radiocarbon dating, as its also called) is not a precise dating method in many cases, due to faulty assumptions and other limitations on this method.
The formation of carbon-14 increases with time, and at the time of creation was probably at or near zero.