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The age of the Earth is approximately 4.54 ± 0.05 billion years (4.54 × 10⁹ years ± 1%). This dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

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Radioactive Decay is The spontaneous transformation of an unstable atomic nucleus into a lighter one, in which radiation is released in the form of alpha particles, beta particles, gamma rays, and other particles.

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Radiocarbon Dating is another term for carbon dating.

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

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The history of Earth concerns the development of planet Earth from its formation to the present day

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

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The Rock Cycle is 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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Rock Strata is a layer of sedimentary rock or soil, or igneous rock were formed at the earth's surface, with internally consistent characteristics that distinguish it from other layers.

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The geological system is a system of chronological dating that relates geological strata (stratigraphy) to time.