What is a half life earth science?

Answer 1

The primary source of radioactivity in the human body is Carbon-14. However the level of Carbon-14 remains constant in the body as the human body is in equilibrium with the atmosphere as long as the body is alive. Therefor there is no halflife until the body dies; then it matches the halflife of Carbon-14.

Answer 2

Half-life is a mathematical and scientific description of exponential or gradual decay.

Half-life may also refer to:

In science:

• Biological half-life, pertaining to organisms (also refers to "elimination half-life", a pharmacokinetic parameter in medicine)

• Effective half-life, the effective radioactive half-life in organisms after accounting for excre

Answer 3

The time required for half of the atoms in a radioactive substance to disintegrate.