Carbon 14 dating seal
The Earth is constantly being bombarded by cosmic rays from outer space.These rays strike nitrogen-14, found in high levels in the atmosphere, and transform this into carbon-14, a radioactive substance.Some animals feed on plants; other living things feed on the creatures that feed on plants.Via this food chain, the radioactive carbon that plants have absorbed from the air is transferred to other living things.Evolutionists use this method in order to determine age when examining the fossil record.However, as with other radiometric tests, there are serious doubts concerning the reliability of carbon-14 dating.For example, if there were 10 grams of carbon-14 in a living thing’s body 5.570 years ago, then there will now be only 5 grams.This test, like other radiometric tests, cannot be used to determine the age of specimens which are thought to be very old, since carbon-14 has only a short half-life.
That is because Carbon-14 is the only radioactive substance found in the bodies of living organisms.
In this way, every living thing on Earth absorbs an equal level of carbon-14 into its body.
When that plant or an animal dies, it is of course no longer able to feed and absorb any more carbon-14.
Since carbon-14 is a radioactive substance, it has a half-life, and gradually begins losing electron.
Thus the age of a once-living thing can be calculated by measuring the amount of carbon-14 left in its tissues. In other words, the amount of carbon-14 in the dead tissue declines by half once every 5.570 years.
Carbon-14 is one form of radiometric test, but one very important feature distinguishes it from the others.