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You are analyzing Moon rocks that contain small amounts of uranium-238, which de

ID: 77208 • Letter: Y

Question

You are analyzing Moon rocks that contain small amounts of uranium-238, which decays into lead with a half-life of about 4.5 billion years. Part B In a rock from the lunar maria, you find that 70% of the original uranium-238 remains, while the other 30% has decayed into lead. Is this rock older or younger than the highlands rock? In a rock from the lunar maria, you find that 70% of the original uranium-238 remains, while the other 30% has decayed into lead. Is this rock older or younger than the highlands rock? older younger

Explanation / Answer

2.3155 billion yrs

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