The Decay of 40K Has a Half of 1

question 51

Multiple Choice

The decay of 40K has a half of 1.3 × 109 years.The age of the earth is estimated at 4.6 × 109 years.The decay of 40K is a major heat source for the earth's interior.Relative to today,how much more heat was produced by 40K in the early Archaeon era or 3.9 × 109 years ago?

• A)2x
• B)4x
• C)6x
• D)8x

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Definitions:

Phenylketonuria

A genetic disorder characterized by the body's inability to break down the amino acid phenylalanine, requiring dietary restrictions from early life.

Genetic Disorder

A disease or condition caused by abnormalities in an individual's genome; can be inherited or result from a new mutation.

Specific Gravity

A measure of the density of a substance compared to the density of water at a specified temperature.

Chronic Renal Disease

A long-term condition where the kidneys gradually lose their function, leading to the accumulation of waste products in the blood.