| refer as dating | 0.52 |
| provide objective age e… | 0.48 |
| use occurring isotope | 0.43 |
| contribute to the debate | 0.43 |
| use occurring isotope c… | 0.36 |
| compare the amount of n… | 0.35 |
| allowed key transitions | 0.30 |
| become more difficult | 0.29 |
| determine dates of anci… | 0.28 |
| refer as carbon-14 | 0.28 |
| More » |
| many limitations | 0.34 |
| used to determine the a… | 0.48 |
| used to learn the ages … | 0.35 |
| based on a few simple p… | 0.32 |
| designed to measure res… | 0.30 |
| used to measure the age… | 0.25 |
| invented in the 1950s | 0.25 |
| used in archaeology | 0.25 |
| good for determining th… | 0.19 |