Answer :
Radioactive isotopes & fossils can be used by scientists to date the sediment layer they are found in
Explanation:
Carbon dating is one of the methods used to determine the age of rocks. Because C-14 has a half-life of 5,730 years by determining the amount of C-14 remaining in the rocks layer in relation to nitorgen-14, the stable element that it decays into.
The fossils embedded in the sediment layers can also be used to determine the relative age of the sediment layers. Older fossils are found are usually found in the lower layers of sediments while younger fossil are found in the upper layers of sediments.
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