WVGSA Grade 8 Science Practice Questions - West Virginia General Summative Assessment Grade 8 Science Exam

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Radioactive isotope Carbon-14 has a half-life of 5,730 years. A fossilized wooden tool discovered in an archaeological site contains exactly 25% of its original Carbon-14 parent isotope. How old is the wooden tool?

5,730 years 11,460 years 17,190 years 22,920 years

Correct Answer:

11,460 years

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