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.
1)In a rock from the lunar highlands, you determine that 50% of the original uranium-238 remains, while the other 50% has decayed into lead. How old is the rock?
In a rock from the lunar maria, you find that 60% of the original uranium-238 remains, while the other 40% has decayed into lead. Is this rock older or younger than the highlands rock?
2.)The rock is younger, but by how much?
1)In a rock from the lunar highlands, you determine that 50% of the original uranium-238 remains, while the other 50% has decayed into lead. How old is the rock?
In a rock from the lunar maria, you find that 60% of the original uranium-238 remains, while the other 40% has decayed into lead. Is this rock older or younger than the highlands rock?
2.)The rock is younger, but by how much?