Astronomy, age of a moon rock, half life

Thread starter CrossFit415
Start date Mar 11, 2011
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Age Astronomy Half life Life Moon Rock

AI Thread Summary

Moon rocks containing uranium-238 decay to lead with a half-life of 4.5 billion years. If a lunar rock sample contains half of the original uranium-238, it indicates that one half-life has passed, making the rock approximately 4.5 billion years old. To solve for the age of the rock, the half-life formula can be applied, where the age is calculated based on the remaining quantity of uranium-238. Understanding half-life is crucial, as it refers to the time required for half of a radioactive substance to decay. The discussion emphasizes the significance of half-life in determining the age of geological samples.

Mar 11, 2011

CrossFit415

Moon rocks containing uranium 238, decays to lead with a half life of 4.5 billion yrs. The lunar rock sample you're invistigating contains half of the original uranium 238. How old is the rock?

How would I go about solving this? What formula should I use?

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Mar 11, 2011

zhermes

What is a half-life? What does half-life mean?

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