https://padlet.com/305158/2cxqf5a1crim N/A en-us 2018-01-23 18:21:28 UTC 2025-10-23 10:49:35 UTC hello@padlet.com 305158 https://padlet.com/305158/2cxqf5a1crim/wish/223932212 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 18:22:59 UTC https://padlet.com/305158/2cxqf5a1crim/wish/223932212 305158 https://padlet.com/305158/2cxqf5a1crim/wish/223933757 one of a number of portions or divisions likened to layers or levels: an allegory with many strata of meaning. Geology. a single bed of sedimentary rock, generally consisting of one kind of matter representing continuous deposition.]]> 2018-01-23 18:25:36 UTC https://padlet.com/305158/2cxqf5a1crim/wish/223933757 305158 https://padlet.com/305158/2cxqf5a1crim/wish/223935400 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 18:28:15 UTC https://padlet.com/305158/2cxqf5a1crim/wish/223935400 305158 https://padlet.com/305158/2cxqf5a1crim/wish/223936896  The definition of a fossil is the preserved remains of a prehistoric organism or is slang for someone or something that is old and outdated. An example of a fossil is the preserved remains from a prehistoric organism that have been preserved inside rock.]]> 2018-01-23 18:30:11 UTC https://padlet.com/305158/2cxqf5a1crim/wish/223936896 305158 https://padlet.com/305158/2cxqf5a1crim/wish/223937839 For example, the half-life of a radioactive substance is the amount of time it takes for half of its atoms to decay, and the half-life of a drug is the amount of time it takes before half of the active elements are either eliminated or broken down by the body.]]> 2018-01-23 18:31:42 UTC https://padlet.com/305158/2cxqf5a1crim/wish/223937839 305158 https://padlet.com/305158/2cxqf5a1crim/wish/223938897 a method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.]]> 2018-01-23 18:33:42 UTC https://padlet.com/305158/2cxqf5a1crim/wish/223938897 305158 https://padlet.com/305158/2cxqf5a1crim/wish/223939541 the determination of the age of objects of organic origin by measurement of the radioactivity of their carbon content.]]> 2018-01-23 18:34:49 UTC https://padlet.com/305158/2cxqf5a1crim/wish/223939541 305158 https://padlet.com/305158/2cxqf5a1crim/wish/223941612 any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived radioactive elements or the amount of a long-lived radioactive element plus its decay product.]]> 2018-01-23 18:38:00 UTC https://padlet.com/305158/2cxqf5a1crim/wish/223941612