Question

Fossils are dated by

• A. Amount of calcium
• B. Radioactive carbon content
• C. Association with mammals
• D. Both A and B
  

Answer 1

Answer: (B)

Radioactive carbon content

• The age of the fossils is determined by radiometric or radioactive dating technique.

• In radioactive dating technique, the half-life of carbon and radioactive carbon content is determined to calculate the age of the fossil.

• Hence fossils are dated by radioactive carbon content.

So, the correct answer is 'Radioactive carbon content'.