What is radiometric dating and how is it used

Fossils are generally found in sedimentary rock — not igneous rock.

In radiometric dating, the amount of a certain radioactive isotope in an object is compared with a reference amount.

There are a wide variety of radioisotopes to be used ranging from 14C (5700 years half life)…

Radiometric or Radio-active decay dating involves looking at certain radio-active isotopes in the rocks of the earth, such as potassium and argon.

The universe is full of naturally occurring radioactive elements.

Radioactive atoms are inherently unstable; over time, radioactive "parent atoms" decay into stable "daughter atoms." When molten rock cools, forming what are called igneous rocks, radioactive atoms are trapped inside. By measuring the quantity of unstable atoms left in a rock and comparing it to the quantity of stable daughter atoms in the rock, scientists can estimate the amount of time that has passed since that rock formed.

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