While organisms live, they incorporate radioactive carbon-14 from the atmosphere.
By measuring the ratio of carbon-14 to stable carbon-12, scientists can then determine when the organism in question died.
One of the impressive points Whitewall makes is the conspicuous absence of dates between 4,500 and 5,000 years ago illustrating a great catastrophe killing off plant and animal life world wide (the flood of Noah)!
I hope this helps your understanding of carbon dating.
If something carbon dates at 7,000 years we believe 5,000 is probably closer to reality (just before the flood).
Robert Whitelaw has done a very good job illustrating this theory using about 30,000 dates published in Radio Carbon over the last 40 years.