We are currently in the Quaternary period of the Cenozoic era.
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Q8: Relative dating of geologic events was not
Q9: Relative dating approximates how long ago a
Q10: Geologists use the natural radioactive decay of
Q11: Atoms with an unequal number of protons
Q12: Obtaining an absolute age for most sedimentary
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Q15: The present geologic time scale is based
Q16: Protons are neutral particles in the nucleus
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Q18: Tree-ring dating, or dendrochronology, is a relative
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