https://padlet.com/3067331/75v6wti3okb2 en-us 2018-02-07 19:11:33 UTC 2023-02-02 06:18:56 UTC hello@padlet.com 3067331 https://padlet.com/3067331/75v6wti3okb2/wish/229403919 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.]]> 2018-02-08 02:48:34 UTC https://padlet.com/3067331/75v6wti3okb2/wish/229403919 3067331 https://padlet.com/3067331/75v6wti3okb2/wish/229403969 In geology and related fields, a stratum (plural: strata) is a layer of sedimentary rock or soil, or igneous rock that were formed at the earth's surface, with internally consistent characteristics that distinguish it from other layers.]]> 2018-02-08 02:48:51 UTC https://padlet.com/3067331/75v6wti3okb2/wish/229403969 3067331 https://padlet.com/3067331/75v6wti3okb2/wish/229404011 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.]]> 2018-02-08 02:49:05 UTC https://padlet.com/3067331/75v6wti3okb2/wish/229404011 3067331 https://padlet.com/3067331/75v6wti3okb2/wish/229404057 The remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.]]> 2018-02-08 02:49:20 UTC https://padlet.com/3067331/75v6wti3okb2/wish/229404057 3067331 https://padlet.com/3067331/75v6wti3okb2/wish/229404074 The time taken for the radioactivity of a specified isotope to fall to half its original value.]]> 2018-02-08 02:49:26 UTC https://padlet.com/3067331/75v6wti3okb2/wish/229404074 3067331 https://padlet.com/3067331/75v6wti3okb2/wish/229404095 A method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.]]> 2018-02-08 02:49:32 UTC https://padlet.com/3067331/75v6wti3okb2/wish/229404095 3067331 https://padlet.com/3067331/75v6wti3okb2/wish/229404141 Another term for carbon dating.]]> 2018-02-08 02:49:45 UTC https://padlet.com/3067331/75v6wti3okb2/wish/229404141 3067331 https://padlet.com/3067331/75v6wti3okb2/wish/229404197 (Also known as nuclear decay 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]]> 2018-02-08 02:50:00 UTC https://padlet.com/3067331/75v6wti3okb2/wish/229404197