Reaper534
An isotope of carbon that is radioactive is _________.
A. carbon12
B. carbon13
C. carbon14
D. carbon15



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Bassthoven
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C

Reaper534
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ok

Reaper534
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By applying the law of superposition, _______________ dates can be determined.
A. relative
B. absolute
C. radiometric
D. isotope

Bassthoven
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A

Reaper534
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Fishes were first abundant during the ...
A. Precambrian
B. Paleozoic
C. Mesozoic
D. Cenozoic
i out c it was wrong

Reaper534
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put*

Bassthoven
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B or D