An Archaeologist Finds the ¹⁴C in a Sample of

question 21

Multiple Choice

An archaeologist finds the ¹⁴C in a sample of of material to be decaying at 107 counts per second. A modern 1.00-g sample of the same material decays at 151 counts per second. The half-life of ¹⁴C is 5730 y. How old is the sample?

• A) 12,200 y
• B) 8460 y
• C) 25,100 y
• D) 12,600 y

---

Definitions:

Normal Weight

A weight classification based on body mass index (BMI) that is considered within the healthy range for a person's height.

Body Mass Index

A numerical measurement calculated from height and weight that is used to assess whether a person is underweight, normal weight, overweight, or obese.

Overweight

A condition characterized by an individual having more body fat than is optimally healthy for their height and build.

Evolutionary Approach

A perspective in various disciplines, including psychology and biology, that seeks to explain traits, behaviors, and strategies as adaptations that have evolved to solve reproductive and survival problems.