Wednesday, April 14, 2010

To find the age of plant and animal remains, we can sometimes compare the ratio of radioactive carbon-14 to?

To find the age of plant and animal remains, we can sometimes compare the ratio of radioactive carbon-14 to carbon-12 found in them. If the remains are quite old,








A. most of the carbon will be in the form of C-14.


B. there will be more C-14 than C-12.


C. there will be much less C-14 than we would find in a living organism.


D. there will be much more C-14 than we would find in a living organism.

To find the age of plant and animal remains, we can sometimes compare the ratio of radioactive carbon-14 to?
C





The way radioactive dating works is C-14 is unstable, thus it will decay into C-12 over time by losing neutrons in it's nucleus. The half-life is the amount of time for 1/2 of the C-14 to decay into C-12. C-12 doesn't go back into C-14 unless it is made to. Thus, we can accurately calculate the age of very old specimens using the C-14 to C-12 ratio with simple math.
Reply:C. there will be much less C-14 than we would find in a living organism


i think , i think they use half life or watever to figure it out
Reply:If the remains are quite old, there will be much less C-14 than we would find in a living organism. (C.)





B/C the radioactive C-14 has decayed after the organism stopped refreshing its carbon supply by living.


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