Question

How are C-14 and U-238 dating used together in order to determine fossil ages?

Answer 1

★ Those physical quantities which are derived using the fundamental quantities are Derived quantities.

★ Example:-

1). Speed = Derived using length and time.

Speed = Distance/time = m/sec

2). Acceleration = Rate of change of Velocity. (m/sec²)

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Answer 2

Hello!♥

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Uranium 238 is only found in igneous or volcanic rocks. So no fossils can be dated directly using U 238. Because of the huge differences in the half lives of Carbon 14 and Uranium238 they cannot be used together. Carbon 14 can only be used to date fossils of a very recent age.

• Hope it helps!