It is found by the radioactive age-dating technique that only one-quarter of the original sample of a radiogenic element remains, so the time is calculated to be two half-lives. What does this time represent?
A)the age of the universe
B)the age of the solar system
C)the time since the formation of the elements
D)the time since the rock was formed

Question

Quizplus · Accepted Answer

The time calculated represents the time since the rock was formed, as it is based on the decay of a radiogenic element within the rock. The other options (A, B, and C) are not related to the decay of a specific radiogenic element within a rock sample.

It Is Found by the Radioactive Age-Dating Technique That Only