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Which of the following radioactive isotopes has the shortest half-life?

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What scientific avenue of investigation gave scientists the best estimate of the age of the Earth?

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Which of the following is used by geologists to determine the relative ages in a rock sequence?

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Radiometric dating is least useful for ___________ rocks.

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Fossils are most common in which rock types?

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Radiometric age is often referred to as __________ age.

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Which of the following radioactive isotopes has the longest half-life?

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Most periods in the geologic time scale are named for _______

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Quiz On Dinosaur 5
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