https://padlet.com/303884/p6rpkaxyuhmp Made with whimsy en-us 2018-01-23 17:30:48 UTC 2026-01-29 09:28:07 UTC hello@padlet.com 303884 https://padlet.com/303884/p6rpkaxyuhmp/wish/223900708 is a system of chronological dating that relates geological strata to time.]]> 2018-01-23 17:32:14 UTC https://padlet.com/303884/p6rpkaxyuhmp/wish/223900708 303884 https://padlet.com/303884/p6rpkaxyuhmp/wish/223902408 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 17:34:54 UTC https://padlet.com/303884/p6rpkaxyuhmp/wish/223902408 303884 https://padlet.com/303884/p6rpkaxyuhmp/wish/223902534 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 17:35:08 UTC https://padlet.com/303884/p6rpkaxyuhmp/wish/223902534 303884 https://padlet.com/303884/p6rpkaxyuhmp/wish/223902638 the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.]]> 2018-01-23 17:35:18 UTC https://padlet.com/303884/p6rpkaxyuhmp/wish/223902638 303884 https://padlet.com/303884/p6rpkaxyuhmp/wish/223902766 the time taken for the radioactivity of a specified isotope to fall to half its original value.]]> 2018-01-23 17:35:30 UTC https://padlet.com/303884/p6rpkaxyuhmp/wish/223902766 303884 https://padlet.com/303884/p6rpkaxyuhmp/wish/223902918 a method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.]]> 2018-01-23 17:35:45 UTC https://padlet.com/303884/p6rpkaxyuhmp/wish/223902918 303884 https://padlet.com/303884/p6rpkaxyuhmp/wish/223903334 another term for carbon dating.]]> 2018-01-23 17:36:24 UTC https://padlet.com/303884/p6rpkaxyuhmp/wish/223903334 303884 https://padlet.com/303884/p6rpkaxyuhmp/wish/223903584 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 17:36:49 UTC https://padlet.com/303884/p6rpkaxyuhmp/wish/223903584