https://padlet.com/309620/d90dlq83b9k0 Made with the best of intentions en-us 2018-01-16 16:38:40 UTC 2025-10-27 22:24:35 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Alarmclock.png 309620 https://padlet.com/309620/d90dlq83b9k0/wish/221778150 The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time.]]> 2018-01-16 16:39:16 UTC https://padlet.com/309620/d90dlq83b9k0/wish/221778150 309620 https://padlet.com/309620/d90dlq83b9k0/wish/221778765 In geology and related fields, a stratum (plural: strata) is a layer of sedimentary rock or soil, or igneous rockwhere formed at the earth's surface, with internally consistent characteristics that distinguish it from other layers.]]> 2018-01-16 16:40:28 UTC https://padlet.com/309620/d90dlq83b9k0/wish/221778765 309620 https://padlet.com/309620/d90dlq83b9k0/wish/221779214 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.

]]> 2018-01-16 16:41:34 UTC https://padlet.com/309620/d90dlq83b9k0/wish/221779214 309620 https://padlet.com/309620/d90dlq83b9k0/wish/221779679 the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.]]> 2018-01-16 16:42:33 UTC https://padlet.com/309620/d90dlq83b9k0/wish/221779679 309620 https://padlet.com/309620/d90dlq83b9k0/wish/221780294 The history of Earth concerns the development of planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to the understanding of the main events of Earth's past.Earth Formed around 4.54 billion years ago by accretion from the solar nebula.]]> 2018-01-16 16:43:50 UTC https://padlet.com/309620/d90dlq83b9k0/wish/221780294 309620 https://padlet.com/309620/d90dlq83b9k0/wish/221781003 the time taken for the radioactivity of a specified isotope to fall to half its original value.]]> 2018-01-16 16:45:26 UTC https://padlet.com/309620/d90dlq83b9k0/wish/221781003 309620 https://padlet.com/309620/d90dlq83b9k0/wish/221782311 a method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.

]]> 2018-01-16 16:47:50 UTC https://padlet.com/309620/d90dlq83b9k0/wish/221782311 309620 https://padlet.com/309620/d90dlq83b9k0/wish/221782976 another term for carbon dating.]]> 2018-01-16 16:49:17 UTC https://padlet.com/309620/d90dlq83b9k0/wish/221782976 309620 https://padlet.com/309620/d90dlq83b9k0/wish/221784047 radioactive decay. (rā'dē-ō-āk'tĭv) 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.]]> 2018-01-16 16:52:00 UTC https://padlet.com/309620/d90dlq83b9k0/wish/221784047 309620 https://padlet.com/309620/d90dlq83b9k0/wish/221784776 The age of the Earth is approximately 4.54 ± 0.05 billion years (4.54 × 10⁹ years ± 1%). This dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.]]> 2018-01-16 16:53:26 UTC https://padlet.com/309620/d90dlq83b9k0/wish/221784776