Question

Which quantity helps determine the absolute age of rocks and fossils?(1 point)
Responses

A. the ratio of protons to neutrons in carbon-14
B. the difference between the number of protons and neutrons in carbon-14
C. the difference between the amounts of carbon-12 and carbon-14
D. the ratio of carbon-12 to carbon-14

Answer 1

The quantity that helps determine the absolute age of rocks and fossils is:

**D. the ratio of carbon-12 to carbon-14**

This ratio is used in radiocarbon dating to determine the age of organic materials.