Part 2: Part of How Old is the Earth

What is the significance of radioactive decay in determining the age of the Earth?

• Radioactive decay has no impact on geological time scales.
• Radioactive decay is significant for determining the Earth's age as it provides a reliable method to date ancient rocks and minerals.
• Radioactive decay is primarily used for medical applications.
• Radioactive decay is only relevant for dating fossils.

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How did Clair Cameron Patterson determine a more accurate age of the Earth?

• used plutonium from fossil fuels

• used uranium-lead isotope dating on meteorites

• used uranium from basalt rock

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Why do did we use meteorites to date the age of the Earth?

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