Discussion
Radio carbon dating technique is used to estimate the age of
Answer: B
Radiocarbon dating is used to estimate the age of fossils, that is, of once-living material.
Living organisms take in carbon-14 from the atmosphere. When they die the intake stops and the carbon-14 decays with a half-life of about 5,730 years. Measuring how much is left gives the time since death, up to roughly 50,000 years, so the method suits bones, wood, shells and other organic remains.
Rocks are dated by other radioactive clocks, such as uranium-lead or potassium-argon, because they contain no carbon from living things. Soil and buildings are not dated as such; only organic material found in them can be.
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