Posted by:
baura
(
)
Date: August 20, 2014 04:12PM
Carbon dating has to do with when plant life GREW. Carbon-14,
an unstable element, is created in the upper atmosphere from
cosmic rays and then decays to nitrogen according to the known
half-life of Carbon-14.
Plants take in carbon dioxide from the atmosphere which has a
fixed ratio of carbon-14. Plants use the carbon from the
atmosphere in forming their structure.
So all plants originally had the same ratio of Carbon-14 to
carbon-12 (the "normal" carbon) as the atmosphere has. After
plants are formed they do not take in any more atmospheric
carbon.
Then when plants die the carbon-14 in them decays according to
its known half-life. Thus the ratio of carbon-14 to carbon-12
in a plant will drop off with time as the carbon-14 atoms
decay.
This is how carbon-14 dating of plants works. It has nothing
to do with when protons and electrons, or even atoms, were
originally created. It has to do with carbon-14 atoms being
formed in the upper atmosphere from cosmic rays striking
nitrogen atoms.
Animals eat plants, therefore the carbon in animals comes from
plant carbon and, allowing for a short lag between the plant
growing and the animal eating it, animal remains are
susceptible to carbon-14 dating methods. Carnivores eat other
animals, it is true, but the food chain for ALL animals leads
to plant life.
However radio-carbon dating (carbon-14 dating) has been
extensively tested on historical objects of known age and,
going even further back, on tree rings.
(Tree-rings have established, without need for carbon dating
techniques, at least 11,000 years of things growing on the
earth:
http://en.wikipedia.org/wiki/DendrochronologyThat two completely disparate dating methods give the same
result speaks well for them.)
It works. It's been proven to work, and it's accurate.
What is interesting is that your intelligent friend has
INVENTED a flawed solution that allows her to continue a false
belief. She has not gone to the trouble of actually checking
to see if her invented solution really makes sense or not, but
has made something up and decided that it is valid.