Fact 1: Radioactive dating is used to determine the age of fossils.

Fact 2: Carbon 14 Dating Perhaps the best known radioactive dating is based on .

Given the two facts above, answer the question "The age of a fossil can sometimes be determined by what method?" with the following options: 
- microscope
 - an electron microscope
 - fossilized electrons
 - fossilized gamma rays
 - Carbon fibers
 - carbon 14 dating
 - chemical equations
 - Physical weathering


 

      carbon 14 dating   