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The age of the Earth is approximately 4.54 ± 0.05 billion years (4.54 × 10⁹ years ± 1%).

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Radioactive decay (also known as nuclear decay of radioactivity) is the process by which an unstable atomic nucleus loses energy (in terms of mass in its rest frame) by emitting radiation, such as an alpha particle, beta particle with neutrino or only a neutrino in the case of electron capture, gamma ray, or electron

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Radiocarbon Dating Radiocarbon dating is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon. 

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Radiocarbon Dating Radiocarbon dating is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon. 

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Radiometric dating or radioactive dating is a technique used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed.

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Uranium 238 has a half-life of 4.5 billion years! Through decay Uranium-238 turns into stable Lead-206. Because its half-life is so long it is useful for dating the oldest rocks on Earth, but not very reliable for rocks under 10 million years old.

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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. ... Earth Formed around 4.54 billion years ago by accretion from the solar nebula.

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A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age.

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The Rock Cycle is a group of changes. Igneous rock can change into sedimentary rock or into metamorphic rock.

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