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Which radioactive isotope is most useful for determining the age of mastodont bones
carbon-14
decay at a predictable rate
the same as the original specimen's half-life
composition of the substance
C14 and N14
The disintegration of radioactive substances occurs at a predictable rate.
U238
the same
If an object is cut in eight equal pieces, what happens to its half life?
carbon-14
decay at a predictable rate
the same as the original specimen's half-life
composition of the substance
C14 and N14
The disintegration of radioactive substances occurs at a predictable rate.
U238
the same
If a radioactive material were cut into pieces, the half-life of each piece would be
carbon-14
decay at a predictable rate
the same as the original specimen's half-life
composition of the substance
C14 and N14
The disintegration of radioactive substances occurs at a predictable rate.
U238
the same
The half-life of a radioactive substance is mainly controlled by the
carbon-14
decay at a predictable rate
the same as the original specimen's half-life
composition of the substance
C14 and N14
The disintegration of radioactive substances occurs at a predictable rate.
U238
the same
Why are radioactive substances useful for measuring geologic time?
carbon-14
decay at a predictable rate
the same as the original specimen's half-life
composition of the substance
C14 and N14
The disintegration of radioactive substances occurs at a predictable rate.
U238
the same
Which radioactive isotope disintegrates to lead (Pb206)?
carbon-14
decay at a predictable rate
the same as the original specimen's half-life
composition of the substance
C14 and N14
The disintegration of radioactive substances occurs at a predictable rate.
U238
the same
One similarity between uranium-238 and carbon-14 is that both
carbon-14
decay at a predictable rate
the same as the original specimen's half-life
composition of the substance
C14 and N14
The disintegration of radioactive substances occurs at a predictable rate.
U238
the same
Which two elements are most useful for the radioactive dating of recent organic remains?
carbon-14
decay at a predictable rate
the same as the original specimen's half-life
composition of the substance
C14 and N14
The disintegration of radioactive substances occurs at a predictable rate.
U238
the same
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