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It is used in dating things such as bone, cloth, wood and plant fibers that were created in the relatively recent past by human activities.The impact of the radiocarbon dating technique on modern man has made it one of the most significant discoveries of the 20th century.Here’s an example using the simplest atom, hydrogen. Carbon-14 is an unstable isotope of carbon that will eventually decay at a known rate to become carbon-12.

­ ­You probably have seen or read news stories about fascinating ancient artifacts.

Green plants and algae remove carbon dioxide from the atmosphere by When an animal eats a plant, carbon from the plant becomes part of the fats and proteins in the animal.

Microorganisms and some animals feed on waste material from animals, and the remains of dead animals and plants.

The carbon cycle shows how carbon moves from the atmosphere, through various animals and plants, then back into the atmosphere again.

All cells contain carbon compounds such as proteins, fats and carbohydrates.

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