How do scientists know how old an object or human remains are?
What methods do they use and how do these methods work?
One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
Libby was awarded the Nobel Prize in chemistry for his work in 1960.At an archaeological dig, a piece of wooden tool is unearthed and the archaeologist finds it to be 5,000 years old.A child mummy is found high in the Andes and the archaeologist says the child lived more than 2,000 years ago.Each radioactive isotope decays by a fixed amount, and this amount is called the half-life. You probably have seen or read news stories about fascinating ancient artifacts.
Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that This is the British English definition of carbon dating. Change your default dictionary to American English. Blog A must for anyone with an interest in the changing face of language.