[ Vocabulary ]
__________ is a technique in which scientists calculate the age of a sample based on the amount of remaining radioactive isotopes it contains
A. isotope dating
B. retroactive dating
C. radioactive dating
D. index fossilization
Select your answer:
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Grammar › Viewthe pitch at which a person speaks with the least strain and with the best resonance
A. tar pitch
B. low pitch
C. high pitch
D. optimum pitch
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If I need to call you.
A. Phrase
B. Clause