https://padlet.com/3049181/7an9sj01ormp Made with a stroke of good luck en-us 2018-01-23 19:16:28 UTC 2024-07-01 16:42:12 UTC hello@padlet.com 3049181 https://padlet.com/3049181/7an9sj01ormp/wish/223969073 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.]]> 2018-01-23 19:21:00 UTC https://padlet.com/3049181/7an9sj01ormp/wish/223969073 3049181 https://padlet.com/3049181/7an9sj01ormp/wish/223969761 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.

]]> 2018-01-23 19:22:08 UTC https://padlet.com/3049181/7an9sj01ormp/wish/223969761 3049181 https://padlet.com/3049181/7an9sj01ormp/wish/223969903 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.]]> 2018-01-23 19:22:22 UTC https://padlet.com/3049181/7an9sj01ormp/wish/223969903 3049181 https://padlet.com/3049181/7an9sj01ormp/wish/223970947 the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.]]> 2018-01-23 19:24:11 UTC https://padlet.com/3049181/7an9sj01ormp/wish/223970947 3049181 https://padlet.com/3049181/7an9sj01ormp/wish/223971661 the time taken for the radioactivity of a specified isotope to fall to half its original value.]]> 2018-01-23 19:25:23 UTC https://padlet.com/3049181/7an9sj01ormp/wish/223971661 3049181 https://padlet.com/3049181/7an9sj01ormp/wish/223971775 a method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.]]> 2018-01-23 19:25:36 UTC https://padlet.com/3049181/7an9sj01ormp/wish/223971775 3049181 https://padlet.com/3049181/7an9sj01ormp/wish/223972563 the determination of the age or date of organic matter from the relative proportions of the carbon isotopes carbon-12 and carbon-14 that it contains. The ratio between them changes as radioactive carbon-14 decays and is not replaced by exchange with the atmosphere.]]> 2018-01-23 19:26:36 UTC https://padlet.com/3049181/7an9sj01ormp/wish/223972563 3049181 https://padlet.com/3049181/7an9sj01ormp/wish/223972792 radioactive decay. 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.]]> 2018-01-23 19:27:02 UTC https://padlet.com/3049181/7an9sj01ormp/wish/223972792