How do we determine geologic age?

To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.

Explanation: Hope this helps :)

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.