How old is the earth according to carbon dating
Astronomers use the distance to galaxies and the speed of light to calculate that the light has been traveling for billions of years.The expansion of the universe gives an age for the universe as a whole: 13.7 billion years old.
As time passes, a rock will have more and more Argon-40 and less and less Potassium-40. Selector .selector_input_interaction .selector_input. Selector .selector_input_interaction .selector_spinner. Many independent measurements have established that the Earth and the universe are billions of years old.European oak trees have been used to build a 12,000-year chronology.The annual ice layers in glaciers provide a similar method that goes back much further in history.In this case, Argon-40 is a gas that easily bubbles out and escapes when it is produced in molten rock.
Once the rock hardens, however, all the Argon-40 is trapped in the sample, giving us an accurate record of how much Potassium-40 has decayed since that time.
As Christians, we believe that God created the world and that the world declares his glory, so we can’t ignore what nature is telling us about its history.
If you’ve ever seen a horizontal slice of a tree trunk, you’ve seen how a tree forms a new growth ring each year.
Radiometric dating is possible because this decay occurs at a known rate, called the “half-life” of the radioactive element.
The half-life is the time that it takes for half the radioactive sample to change from one element into the other.
Most old rocks have been eroded by wind and water or submerged by continental plates.