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Since the planet Earth doesn't have a birth certificate to record its formation, scientists have spent hundreds of years struggling to determine the age of the planet. By dating the rocks in the ever-changing crust, as well as neighbors such as the moon and visiting meteorites, scientists have calculated that ...

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Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation, such as an alpha particle, beta particle with neutrino or only a neutrino in the case of electron

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another term for carbon dating.

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a method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.

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the time taken for the radioactivity of a specified isotope to fall to half its original value.

the time required for any specified property (e.g., the concentration of a substance in the body) to decrease by half.

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The history of Earth concerns the development of planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to the understanding of the main events of Earth's past. ... Earthformed around 4.54 billion years ago by accretion from the solar nebula.

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the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.

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an idealized cycle of processes undergone by rocks in the earth's crust, involving igneous intrusion, uplift, erosion, transportation, deposition as sedimentary rock, metamorphism, remelting, and further igneous intrusion.

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In geology and related fields, a stratum is a layer of sedimentary rock or soil, or igneous rock where formed at the earth's surface, with internally consistent characteristics that distinguish it from other layers.

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The geologic time scale is a system of chronological dating that relates geological strata to time. It is used by geologists, paleontologists, and other Earth scientists to describe the timing