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the radioactive isotope we measure in carbon dating is: |
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how does c14 get into organic matter? |
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-c14 is created in the upper atmosphere -it falls over the earth evenly -organisms take it into their bodies during their lives -at death they stop bringing it into their bodies, thus setting the clock
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we can confidently measure the half-lives of a radioactive isotope up until: |
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at eight half lives of c14: |
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-45000 years have passed --this means carbon is only useful for dating for this long
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radiometric dating techniques are: |
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-absolute dating techneiques -done by measureig the decay of radioactive isotopes into daughters -measuring half lives
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-the amount of time it takes a radioactive isotope to decay half way
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what is the most precise arch dating method? |
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-used to correct the fluctuations in c14 dating because of changing radioactive fall out -from dendrochronolgy
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radiopotassium dating is: |
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a method of radiometric dating for rocks can date the oldest rocks on eart because of very long half life daughter product=argon 40
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the 6 teqchniques of absolute dating are: |
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-carbon14 dating -potassium dating -dendrochronology -fission dating -luminescense dating -paeleomagnetic dating
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the objects ppl use to do things
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the ways in which ppl do things
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the combination of tools, materials, and techniques put together with the knowledge of how to use them in a cultural context
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