Methods of dating minerals and materials can be used to determine their age.
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Sample flash cards in this set:
| Questions | Answers |
|---|---|
| Fluorine Dating | A relative (chemical) dating method that compares the accumulation of fluorine in animal and human bones from the same site. |
| Chemical Dating | Dating methods that use predictable chemical changes that occur over time. |
| Index fossils | Fossils that are from specified time ranges, are found in multiple locations, and can be used to determine the age of associated strata. |
| Cultural Dating | Relative dating methods that are based on material remains' time spans. |
| Pebble Tools | The earliest stone tools, in which simple flakes were knocked off to produce an edge used for cutting and scraping. |
| Dendrochronology | A chronometric dating method that uses a tree-ring count to determine numerical age |
| Radiocarbon Dating | The radiometric dating method in which the ratio of 14C to 12C is measured to provide an absolute date for a material younger than 50,000 years. |
| Isotopes | Two or more forms of a chemical element that vary in the number of neutrons in the nucleus and by the atomic mass. |
| Half-Life | The time it takes for half of the radioisotopes in a substance to decay; used in various radiometric dating methods. |
| Igneous | Rock formed from the crystallization of molten magma, which contains the radioisotope 40K; used in potassium-argon dating. |
| Radiopotassium Dating | The radiometric dating method in which the ratio of 40K to 40Ar is measured to provide an absolute date for a material older than 200,000 years. |
| Fission Track Dating | An absolute dating method based on the measurement of the number of tracks left by the decay of uranium-238 |
