Long-Lived Radioactive Isotope Pairs Used in Radiometric Dating Have Half-Lives

question 35

Short Answer

Long-lived radioactive isotope pairs used in radiometric dating have half-lives of the magnitude of ____________________ or ____________________ of years.

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Definitions:

Reinforce

To strengthen a behavior by providing a consequence that increases the likelihood of the behavior being repeated.

Lever

A simple machine consisting of a rigid bar that pivots on a fixed point, used to transfer force and change the direction of force.

Variable Interval

Variable interval refers to a reinforcement schedule in which rewards are given after unpredictable time intervals, used in behavioral conditioning.

Reinforcement

In psychology, a process by which a stimulus increases the probability of a response through either positive or negative reinforcement.