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Why is carbon used to date things that were once alive

Why is carbon used to date things that were once alive
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Why is carbon used to date things that were once alive

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User Koes Bong
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Carbon 14 dating can only be used on objects which were once living things (plant or animal) because nothing else has a known starting composition of carbon 14 and is less than 50,000 or so years old. In older objects the carbon 14 has decayed to such a low level that the detection becomes difficult.
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User AnjumSKhan
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Answer:

Living things take in carbon from food.

Step-by-step explanation:

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User Ciscoheat
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