What can radiometric dating reveal points 1
"Radiometric dating (often called radioactive dating) is a technique used to date materials such as rocks, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates." [1. It includes carbon dating, uranium/lead dating, potassium/argon dating and more that a dozen other methods using radioisotopes."Reliable" means "Consistently good in quality or performance; able to be trusted." "Reliable "does not been invariably perfect. Neither side may add or modify rules for the debate once the challenge is accepted.Rulers are a reliable way of measuring objects, but nonetheless erroneous measurements occur and they are not absolutely precise. Radiocarbon dating was discovered by Willard Libby, a nuclear chemist at the University of Chicago.The claim is that radiometric dating methods are reliable enough for scientific purposes. Pro may rebut previous arguments using new evidence solely for that purpose, but no new arguments are allowed. He announced his discovery of carbon dating in 1949.Rules This opening round is for definitions and acceptance only. Source links or references must be included within the 8000 characters per round limit of the debate. DR 3 Any term not specifically defined before use is to be taken with the ordinary dictionary definition of the term that best fits the context of the debate. Scientists immediately wondered if the method was reliable.I will give the Pro case at the start of the second round. I list them here for the benefit of new debaters and readers. Both sides agree to the following rules, and that violating the rules is a conduct violation, with anything contrary to the rules to be ignored by readers judging the debate: DR 1. Evidence may be cited or linked from the debate, but only in support of arguments made in the debate. The tests they applied included many test of ancient artefacts having known dates.The method worked so well and proved so reliable that Libby was awarded the Nobel Prize in Chemistry in 1960. dating only works to date things that were once living.
Plants take in the carbon as carbon dioxide, and animals eat the plants.Once carbon 14 is taken out of exchange with the atmosphere, the radioactive carbon starts to decade to stable carbon 12, and the proportion of the radioactive isotope decreases.Measuring the ratio of the isotopes implies the time since the exchange with the atmosphere stopped.Scientists tested the reliability of the method using blind tests of archaeological artefacts having known dates.The first sample was from Zoser’s tomb at Saqqara, Egypt, dated by archaeologists to be 4,650 years old. The second sample, supposedly from the the time of Ptolemy, produced a radiocarbon date of zero.
It turned out the ample was from a "reputable dealer" in Cairo, and was a modern fake. Nature’s Clocks: How Scientists Measure the Age of Almost Everything, University of California Press. The many checks of the method showed that the dates being obtained were averaging a few percent too young.