4th Edition

ISBN: 9780134089089

Author: Jeffrey O. Bennett, Seth Shostak

Publisher: PEARSON

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Chapter 4, Problem 53IF

Dating Lunar Rocks. 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.

a. In one rock from the lunar highlands, you determine that 55% of the original uranium-238 remains; the other 45% decayed into lead. How old is the rock?
b. In a rock from the lunar maria, you find that 63% of the original uranium-238 remains; the other 37% decayed into lead. Is this rock older or younger than the highlands rock? By how much?

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Chapter 4, Problem 52IF

Chapter 4, Problem 54IF

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