If a Radioactive Element Has a Half-Life of 10,000 Years

question 27

Multiple Choice

If a radioactive element has a half-life of 10,000 years, what fraction of it is left in a rock after 40,000 years?

• A) 1/2
• B) 1/4
• C) 1/8
• D) 1/16
• E) 1/32

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Definitions:

Oculomotor

Pertaining to the eye's movements and the muscles that control them.

Optic

Relating to the eye or vision, often used in conjunction with nerves, pathways, or diseases affecting sight.

Positron Emission Tomography

An imaging test that uses a radioactive substance to visualize and measure metabolic processes in the body.

Nuclear Imaging

A diagnostic technique that uses small amounts of radioactive materials to create detailed images of the organs and structures inside the body.