Which of these geological periods is the most ancient?
A) Devonian
B) Cambrian
C) Jurassic
D) Silurian
E) Cretaceous
Correct Answer:
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Q12: If the half-life of a radioactive substance
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Q18: Which statement about radiometric dating is true?
A)
Q19: The half-life of a particular radioactive isotope
Q21: After the eruption of a major volcano,the
Q22: There was no life during the
A) Precambrian.
B)
Q23: The most appropriate way to determine the
Q24: Which statement about the geological time scale
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