https://padlet.com/3045172/lyydtc3ynz0j en-us 2018-01-23 17:30:18 UTC 2023-09-18 14:27:09 UTC hello@padlet.com 3045172 https://padlet.com/3045172/lyydtc3ynz0j/wish/223900387  a system of chronological dating that relates geological strata to time]]> 2018-01-23 17:31:47 UTC https://padlet.com/3045172/lyydtc3ynz0j/wish/223900387 3045172 https://padlet.com/3045172/lyydtc3ynz0j/wish/223900831  a layer of sedimentary rock or soil,]]> 2018-01-23 17:32:25 UTC https://padlet.com/3045172/lyydtc3ynz0j/wish/223900831 3045172 https://padlet.com/3045172/lyydtc3ynz0j/wish/223901799 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 17:33:55 UTC https://padlet.com/3045172/lyydtc3ynz0j/wish/223901799 3045172 https://padlet.com/3045172/lyydtc3ynz0j/wish/223901921 the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.]]> 2018-01-23 17:34:09 UTC https://padlet.com/3045172/lyydtc3ynz0j/wish/223901921 3045172 https://padlet.com/3045172/lyydtc3ynz0j/wish/223902034 the time taken for the radioactivity of a specified isotope to fall to half its original value.]]> 2018-01-23 17:34:20 UTC https://padlet.com/3045172/lyydtc3ynz0j/wish/223902034 3045172 https://padlet.com/3045172/lyydtc3ynz0j/wish/223902251 a method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.]]> 2018-01-23 17:34:41 UTC https://padlet.com/3045172/lyydtc3ynz0j/wish/223902251 3045172 https://padlet.com/3045172/lyydtc3ynz0j/wish/223902863  a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon]]> 2018-01-23 17:35:40 UTC https://padlet.com/3045172/lyydtc3ynz0j/wish/223902863 3045172 https://padlet.com/3045172/lyydtc3ynz0j/wish/223903216  the process by which an unstable atomic nucleus loses energy by emitting radiation]]> 2018-01-23 17:36:12 UTC https://padlet.com/3045172/lyydtc3ynz0j/wish/223903216