Question

Which measurement do geologists use to find the absolute age of once-living things?

Answer 1

Radiocarbon dating

Step-by-step explanation:

Radiocarbon dating measures radioactive isotopes in once-living organic material instead of rock, using the decay of carbon-14 to nitrogen-14. Because of the fairly fast decay rate of carbon-14, it can only be used on material up to about 60,000 years old.