Example: wood found in a grave of known age by historically reliable documents is the standard for that time for the C14 content.

This standard content of C14 can then be used for wood not associated with a historically documented date.

Dates up to this point in history are well documented for C14 calibration.

For object over 4,000 years old the method becomes very unreliable for the following reason: Objects older then 4,000 years run into a problem in that there are few if any known artifacts to be used as the standard.

Here are a few reasons why Carbon is so priceless: There are many, many reasons why Carbon is really important.

It is an intrinsic part of life on Earth, and its importance cannot be undermined. Humans and animals need Carbon for their metabolism, in the form of carbohydrates.

However, the principle of carbon-14 dating applies to other isotopes as well.

Potassium-40 is another radioactive element naturally found in your body and has a half-life of 1.3 billion years.

Studying the material remains of past human life and activities may not seem important or exciting to the average Joe unlike the biological sciences.

But archaeology’s aim to understand mankind is a noble endeavor that goes beyond uncovering buried treasures, gathering information, and dating events.

The carbon-14 decays with its half-life of 5,700 years, while the amount of carbon-12 remains constant in the sample.

By looking at the ratio of carbon-12 to carbon-14 in the sample and comparing it to the ratio in a living organism, it is possible to determine the age of a formerly living thing fairly precisely. So, if you had a fossil that had 10 percent carbon-14 compared to a living sample, then that fossil would be: t = [ ln (0.10) / (-0.693) ] x 5,700 years t = [ (-2.303) / (-0.693) ] x 5,700 years t = [ 3.323 ] x 5,700 years Because the half-life of carbon-14 is 5,700 years, it is only reliable for dating objects up to about 60,000 years old.

Significance of Carbon Carbon is extremely important for the existence of almost all the organic and inorganic things present on the earth.