https://padlet.com/3045441/i1n0fsaaipxj Interpretation of a story by Gloria Broder en-us 2018-01-16 16:35:34 UTC 2026-01-23 22:32:18 UTC hello@padlet.com 3045441 https://padlet.com/3045441/i1n0fsaaipxj/wish/221776932 the time taken for the radioactivity of a specified isotope to fall to half its original value.]]> 2018-01-16 16:36:41 UTC https://padlet.com/3045441/i1n0fsaaipxj/wish/221776932 3045441 https://padlet.com/3045441/i1n0fsaaipxj/wish/221777698 The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time. It is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history.

]]> 2018-01-16 16:38:16 UTC https://padlet.com/3045441/i1n0fsaaipxj/wish/221777698 3045441 https://padlet.com/3045441/i1n0fsaaipxj/wish/221778826 In geology and related fields, a stratum (plural: strata) is a layer of sedimentary rock or soil, or igneous rockwhere formed at the earth's surface, with internally consistent characteristics that distinguish it from other layers.]]> 2018-01-16 16:40:38 UTC https://padlet.com/3045441/i1n0fsaaipxj/wish/221778826 3045441 https://padlet.com/3045441/i1n0fsaaipxj/wish/221779329 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.]]> 2018-01-16 16:41:50 UTC https://padlet.com/3045441/i1n0fsaaipxj/wish/221779329 3045441 https://padlet.com/3045441/i1n0fsaaipxj/wish/221780790 A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, hair, petrified wood, oil, coal, and DNA remnants. ]]> 2018-01-16 16:45:00 UTC https://padlet.com/3045441/i1n0fsaaipxj/wish/221780790 3045441 https://padlet.com/3045441/i1n0fsaaipxj/wish/221781436 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. ]]> 2018-01-16 16:46:13 UTC https://padlet.com/3045441/i1n0fsaaipxj/wish/221781436 3045441 https://padlet.com/3045441/i1n0fsaaipxj/wish/221782397 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.]]> 2018-01-16 16:48:00 UTC https://padlet.com/3045441/i1n0fsaaipxj/wish/221782397 3045441 https://padlet.com/3045441/i1n0fsaaipxj/wish/221783150 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.]]> 2018-01-16 16:49:41 UTC https://padlet.com/3045441/i1n0fsaaipxj/wish/221783150 3045441 https://padlet.com/3045441/i1n0fsaaipxj/wish/221784061 The history of Earth concerns the development of planetEarth 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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