Define the term half-life.
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Q16: Why do scientists look at rocks from
Q21: Which CANNOT be accurately dated using radiometric
Q23: The half-life of carbon-14 is _ years.
A)
Q24: Which element has the shortest half-life?
A) rubidium-87
B)
Q28: An isotope is the same element with
Q29: How old is Earth?
A) 1-2 million years
Q34: To determine the age of organic remains,the
Q37: Carbon-14 decays and becomes
A) carbon-16.
B) nitrogen-14.
C) carbon-11.
D)
Q49: Which of these is most likely to
Q53: Earth is estimated to be around
A) 6,000-8,000
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