19. When a radio-isotope in a fossil with a half-life of 3,000 years has been reduced to 1/8th of its original amount, how old is the fossil? a. 2,400 years b. 36,000 years c. 9,000 years d. 12,000 years e. 18,000 years

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Paleontology

A branch of science concerning the scientific study of life from ancient times is known as paleontology. The scientists working on paleontology are known as paleontologists. Paleontologists collect the fossils of organisms from ancient times to classify them. The paleontologists also study the environment from ancient times to study the interactions between different organisms.