Modern dating video
Andy the manny (guest star Adam De Vine) shows up at the Dunphys' doorstep to visit Haley (Sarah Hyland).
Claire (Julie Bowen) suspects that Haley must be dating the "bro pair" (as Andy likes to call himself).
The rate of creation of carbon-14 appears to be roughly constant, as cross-checks of carbon–14 dating with other dating methods show.
However, local eruptions of volcanoes or other events that give off large amounts of carbon dioxide can reduce local concentrations of carbon–14 and give inaccurate dates.
From Season 6, Episode 7 of Modern Family, "Queer Eyes, Full Hearts." ABC WEDNESDAYS 9|8c.
18.3 Modern Dating Methods Radiometric dating has been carried out since 1905, and since then the techniques have been greatly improved and expanded.
Atmospheric nuclear weapon tests almost doubled the concentration of 14C in the Northern Hemisphere.
18.3.6 Radiocarbon Dating Method Radiocarbon dating, or carbon dating, is a radiometric dating method that uses the naturally occurring radioisotope carbon-14 (14C) to determine the age of carbonaceous materials up to about 60,000 years.
After plants die, or after they are consumed by other organisms, the 14C fraction of this organic material declines at a fixed exponential rate due to the radioactive decay of 14C.
Comparing the remaining 14C fraction of a sample to that expected from atmospheric 14C allows the age of the sample to be estimated.
The uranium-lead radiometric dating scheme has been refined to the point that the error margin in dates of rocks can be as low as two million years in two-and-a-half billion year rocks.
An error margin of 2–5 % has been achieved on younger Mesozoic rocks.