If You Obtained a Sample of a Meteorite and Determined

question 95

Multiple Choice

If you obtained a sample of a meteorite and determined the abundances of uranium (²³⁸U) and lead (²⁰⁷Pb) in it, and found that for every 1 uranium atom there were 15 lead atoms, then what would the age of this rock be? Note that this form of uranium decays to this form of lead with a half-life of 700 million years. For simplicity, you can assume that there was no lead in the rock when it originally formed.

• A) 1.4 billion years
• B) 2.8 billion years
• C) 4.0 billion years
• D) 10.5 billion years
• E) 3.6 billion years

---

Definitions:

Low Risk

Refers to investments or decisions that carry a minimal potential for losing value or experiencing negative outcomes.

Insurance Company

A business entity that provides financial protection and risk management to individuals and organizations against potential losses in exchange for premium payments.

Low Risk

Describes investments or activities with a low probability of loss or failure.

Co-Payments

A fixed fee that a patient pays for healthcare services, in addition to what is covered by insurance, often used to share the cost of care.