Relative chronometric dating techniques

With sensitive instrumentation, this range can be extended to 70,000 years.

In addition to the radiocarbon dating technique, scientists have developed other dating methods based on the transformation of one element into another.

Eventually, the entire ecosystem (community of plants and animals) of the planet, including humans, is filled with a concentration of carbon-14.

The time it takes for one-half of the carbon-14 to decay (a period called a half-life) is 5,730 years.Dendrochronology: Also known as tree-ring dating, the science concerned with determining the age of trees by examining their growth rings.Half-life: Measurement of the time it takes for one-half of a radioactive substance to decay.By measuring the amount of carbon-14 remaining, scientists can pinpoint the exact date of the organism's death.The range of conventional radiocarbon dating is 30,000 to 40,000 years.

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  1. Trees from the same species, growing in the same area or environment will be exposed to the same conditions, and hence their growth rings will match at the point where their lifecycles overlap.