41. Carbon-14 Dating Acheological Science Radiocarbon Dating Radiocarbon dating—also known as carbon-14 dating—is a technique used by archeologists and historians to determine the age of organic http://www.arizonaruins.com/Science/Radiocarbon.html

www.ArizonaRuins.com Acheological Science - Radiocarbon Dating Radiocarbon dating—also known as carbon-14 dating—is a technique used by archeologists and historians to determine the age of organic material. It can theoretically be used to date anything that was alive any time during the last 60,000 years or so, including charcoal from ancient fires, wood used in construction or tools, cloth, bones, seeds, and leather. It cannot be applied to inorganic material such as stone tools or ceramic pottery. The technique is based on measuring the ratio of two isotopes of carbon. Carbon has an atomic number of 6, an atomic weight of 12.011, and has three isotopes: carbon-12, carbon-13, and carbon-14. (The numbers 12, 13 and 14 refer to the total number of protons plus neutrons in the atom’s nucleus.) Carbon-12 is by far the most abundant carbon isotope, and carbon-12 and -13 are both stable. But carbon-14 is slightly radioactive: it will spontaneously decay into nitrogen-14 by emitting an anti-neutrino and an electron, with a half-life of 5730 years. The theory behind radiocarbon dating is as follows: Terrestrial carbon contains virtually no carbon-14, since any that may have been present would have long since decayed into the stable nitrogen-14.

42. Carbon 14 Dating Docs Handouts Carbon 14 datingWile Page 1 \ 2 Carbon 14 Dating Dr. Jay L. Wile, Exploring Creation with Physical Science (Chelsea, MI Sheridan Books, Inc., 1999, 2000 http://emp.byui.edu/MARROTTR/Carbon 14 dating-Wile.pdf

43. Carbon 14 Dating | Scienceray The article is on Carbon 14 dating, its positives, negatives, and uses. The article also contains brief history of carbon dating. http://scienceray.com/earth-sciences/physical-geography/carbon-14-dating/

44. Focus On The Family Community: Science - Tour 5: Carbon 14 Dating This online community is brought to you by Focus on the Family. A new kind of familyfriendly gathering place – one that focuses on real issues and topics facing families today. http://www.focusonlinecommunities.com/message/83615

45. Chemistry Tutorial : Carbon-14 Dating A chemistry tutorial on the use of Carbon14 dating suitable for high school students http://www.ausetute.com.au/carbon14.html

home test exam game contact Uses of Radioisotopes: Carbon-14 Dating Key Concepts Carbon has 3 isotopes, 2 of which are stable (carbon-12 and carbon-13) and one which is radioactive (carbon-14). Of these isotopes, the most common in nature is carbon-12. Production of Carbon-14 Carbon-14 is produced in the atmosphere by the interaction of neutrons produced by cosmic rays with the stable isotope of nitrogen, nitrogen-14: n N C H The carbon-14 atoms produced are then incorporated into carbon dioxide (CO ) molecules to produce CO molecules which mix with the most common CO molecules in the atmosphere. The CO enters plant tissue as a result of photosynthesis or absorption through the roots. C enters animal tissue when animals eat plants containing C. The amount of C produced in the atmosphere is balanced by the continual decay of C to produce N and a beta-particle C N e Radiocarbon dating When a plant or animal dies it stops taking in carbon-14 and radioactive decay begins to decrease the amount of carbon-14 in the tissues. The age of the plant or animal specimen containing carbon, such as wood, bones, plant remains, is determined by measuring the ratio of carbon-12 to carbon-14.

46. How Things Work: Carbon-14 Dating - The Tartan Online While some college students might have trouble figuring out how long that Pad Thai’s been sitting in the refrigerator, scientists can use carbon14 dating to determine the http://thetartan.org/2007/4/9/scitech/work

Carnegie Mellon's Student Newspaper Since 1906 Home News Sci/Tech Forum ... Archives April 9, 2007 Join the Staff Advertising Subscribe About Us ... Contact Us How Things Work: Carbon-14 Dating Sci/Tech Sarah Mogin More Sci/Tech Stories SciTech Briefs How Things Work: Carbon-14 Dating Graduate fellowship created for students in MCS While some college students might have trouble figuring out how long that Pad Thai’s been sitting in the refrigerator, scientists can use carbon-14 dating to determine the age of materials as old as 60,000 years. Carbon-14 dating, or radiocarbon dating, uses the amount of carbon-14 in a substance to calculate its age. Scientists can detect the amount of carbon in a material using a process called mass spectronomy, where a magnetic field is used to direct particles toward a sheet of metal with a tiny slit. The magnetic field will curve the paths of the less massive particles to a greater extent than those of the more massive particles, and the slit is placed so that only the particles with the desired mass (that of carbon-14) will go through it. Carbon-14 dating was developed in 1949 by Willard Libby, who later won the Nobel Prize in chemistry for the discovery and advancement of the procedure.

47. Problems With Radiometric And Carbon-14 Dating Helping fight evolution Internet Lex. Deutsch Examples of False Isochrons Problems with Radiometric and Carbon14 Dating. Are the findings of evolution research and its http://www.specialtyinterests.net/carbon14.html

Helping fight evolution Internet Lex. Deutsch Examples of False Isochrons Problems with Radiometric and Carbon-14 Dating Are the findings of evolution research and its chronology any better than those of the chronology of ancient Egypt and its neighbors? Offline: More on C14 Accuracy More on Tree Rings Carbon-14 Dating Methods Radiocarbon dating is still a young science and even though there has been done a lot of research we must understand that each individual tends to accept those data which fit his expectations. What I am attempting to do now is point out some areas of cautions or possible pitfalls in relying too heavily on such dating methods. We all realize that parent radioactive material is transformed into stable daughter products, i.e. > C-14 -> C-13 and/or C-12 [ To illustrate: If we have 1 gram of C-14 decaying at a steady, previously determined rate, after about 5730 years there is according to its half-life only ½ gram of this C-14 left.[ Radiometric dating and real time may be assumed to be equivalent only if the following criteria are met: For C-14 dating the conditions are: The material to be dated must be organic The organism to be tested must have gotten its C-14 from the atmosphere The sample has remained chemically and physically a closed system since its emplacement.

48. Carbon 14 Dating Carbon 14 and archeological ages, Christian and Intelligent Design discussion of source, measurement, results, interpre http://www.slideshare.net/CreationCD/carbon-14-239498

49. Number Of Undecayed M Ms BRSP15 Page 1 * ***** or, How Old Are Those M Ms? One of the tools available to scientists who study ancient climates is called carbon-14 dating (also known http://www.starhop.com/library/pdf/studyguide/middle/C-dating-15.pdf

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