This rock outcrop in Trinidad, CO contains evidence of the asteroid impact 65 million years ago. The top layer was analyzed for radioactive isotopes and found that the rock contains 25% of the parent isotope. This parent isotope has a half-life of 500,000 years.
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Scientists are analyzing a sample of rock from this formation and concluded that the rock contains the parent isotope K40. This parent isotope has a half-life of 1.25 billion years and the isotope has gone through 0.004 half lives.
Next Question
This is a fossil of a mammoth . This mammoth lived during the last ice age, therefore, C14 is an ideal choice to determine the age of the fossil. Paleontologists analyzed the fossil and found that it contains 6.25% of the parent isotope. This parent isotope has a half-life of 5,730 years.
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Absolute-Dating-Practice-Questions
Sabrina Ewald
Created on September 12, 2025
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Transcript
This rock outcrop in Trinidad, CO contains evidence of the asteroid impact 65 million years ago. The top layer was analyzed for radioactive isotopes and found that the rock contains 25% of the parent isotope. This parent isotope has a half-life of 500,000 years.
Next Question
Scientists are analyzing a sample of rock from this formation and concluded that the rock contains the parent isotope K40. This parent isotope has a half-life of 1.25 billion years and the isotope has gone through 0.004 half lives.
Next Question
This is a fossil of a mammoth . This mammoth lived during the last ice age, therefore, C14 is an ideal choice to determine the age of the fossil. Paleontologists analyzed the fossil and found that it contains 6.25% of the parent isotope. This parent isotope has a half-life of 5,730 years.
RESTART