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The age of fossils can be estimated from radioactive elements in them. Which dating method, discovered by W.F. Libby, is used for relatively recent plant and animal remains?
ARadioactive uranium decay dating
BRadioactive carbon (C-14) dating
CRadioactive potassium decay dating
DRadioactive lead isotope dating
Answer & Solution
Correct answer: B. Radioactive carbon (C-14) dating
1. After death, an organism stops taking in carbon and its C-14 steadily decays.
2. Measuring the remaining C-14 gives the time since death.
3. This radioactive carbon (C-14) dating method was discovered by W.F. Libby.
4. So the answer is radioactive carbon (C-14) dating, option B.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 19 Origin and Evolution of Life "Determination of age of Fossils", p.288_
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