How Long Are the Half-Lives of Radioisotopes Commonly Used to Date

question 26

Multiple Choice

How long are the half-lives of radioisotopes commonly used to date igneous and metamorphic rocks?

• A) seconds to minutes
• B) a few years
• C) hundreds of millions to billions of years
• D) hundreds to thousands of years

---

Definitions:

Cancer

A disease characterized by the uncontrolled growth and spread of abnormal cells in the body.

Illusory Correlations

The perception of a relationship between two variables when no such relationship exists.

Associations

Connections or relationships between thoughts, ideas, or objects, often studied in psychology to understand how memory works.

Variables

Elements, features, or factors that can change or vary, often used in experiments to determine their effects on outcomes.