That the rate of decay has been constant. That the measured rock has not had parent or daughter elements added or leached out. All of these assumptions are unverifiable.
how does radioactive dating work? | Yahoo Answers
Radiometric dating is very unreliable - volcanic rock known to be be just years old was dated as 3 billion years old! See refs below for loads of articles - some quite technical.
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In layman's terms, certain carbon molecules within the object have been changes in such a way to make what is called a carbon isotope. These carbon isotopes only last a known amount of time. These isotopes give off a certain amount of radioactive radiation which directly corresponds to it's age.
By measuring the amount of radiation given off by the isotope, scientists can determine how long ago that isotope was created and therefore how old it is. Well you find a nice looking radioactive isotope in a local bar, and casually walk over. Introduce yourself and ask, 'Hey babe, come here often? Radiometric dating is a technique used to date materials based the decay rates of naturally occurring isotopes.
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For example, radiocarbon dating is a method that uses the naturally occurring isotope carbon to determine the age of things like trees, which contain carbon. Take carbon 14 for example.
How Does Carbon 14 Dating Work?
All life contains carbon and has some radioctive c14 in it also. Radioactive isotopes have a half life how long it takes for half of it to turn from c14 to regular carbon. By measuring how much c14 is left in a sample that once lived they can tell how old it is. Tree ring dating is much more accurate. Maybe online video dating is best.
Carbon dating is probably the most common. Does Evolution Depend on Radioactive Dating? If radioactive dating doesn't work? I kinda wish yellowstone would explode? Gear are aligned as shown, and each gear has the number of teeth indicated.
What is the least positive number of rotations gear C must make? Which statement summarizes the primary way in which ocean currents redistribute energy on Earth? I noticed in my preliminary search of answers for this question that there's some kind of creationist vs. I want no part of it. I'm only interested in the science itself. Are you sure you want to delete this answer? C14 which is radioactive is generated in the atmosphere by UV radiation of C All organisms take it in while they are alive, either in their food or by respiration.
As soon as they die, they no longer take it in. Since it radioactive, its presence can be detected. Also, since it is radioactive, it decays at a known rate. If we can calculate the amount of C14 in a given sample size versus how much we expect to find, we can tell how long it has been since any has been incorporated into the tissues. If a sample is expected to have 1g of C14, but it only has 0. So if the cosmic ray flux remains the same, there will be a steady-state concentration of 14C in the atmosphere, which is effectively mixed on a much shorter timescale that the decay of 14 C to 14N.
Using this approximation, we know the proportion of 14C that there was in something while it was exchanging carbon with the CO2 in the atmosphere. Once it dies, exchange stops,and the 14 C decays with a half life of years. We can verify the method, and correct for fluctuations in cosmic rays, by 14C examination of tree rings, where we can literally count the years. This way, we have a corrected 14C scale going back around 10, years. The opposite of creationism is not atheism.
The opposite of creationism is science, although many scientists are atheists. Creationists tell you about snails that have a C14 age of thousands of years, but they are still alive. Point is, these snails live close to caves where a lot of the CO2 comes from redissolving ancient limestone. This is called the "Reservoir effect", and is very well known, which does not stop the creationists from using it to "attack" the science.
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