A Geological Sample Is Found to Have a Pb-206/U-238 Mass

question 15

Multiple Choice

A geological sample is found to have a Pb-206/U-238 mass ratio of 0.337/1.00.Assuming there was no Pb-206 present when the sample was formed,how old is it? The half-life of U-238 is 4.5 × 10⁹ years.

• A) 7.3 × 10¹¹ years
• B) 1.4 × 10¹⁰ years
• C) 2.4 × 10¹⁰ years
• D) 2.1 × 10⁹ years
• E) 7.1 × 10⁹ years

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Definitions:

Reproductive Potential

The biological capability to reproduce, involving factors like the viability of gametes, fertility, and general health influencing the success of reproduction.

Good Health

A state of complete physical, mental, and social well-being, not merely the absence of disease or infirmity.

Sexual Strategies Theory

The theory that men and women have different short-term and long-term mating strategies.

Evolutionary Mating

A theory suggesting that the patterns of dating, courtship, and sexual behavior are driven by innate biological instincts developed through natural selection to ensure reproductive success.