https://padlet.com/304792/fy6hwkv26wns Made with eyes on the prize en-us 2018-01-16 18:31:03 UTC 2024-12-14 17:58:32 UTC hello@padlet.com 304792 https://padlet.com/304792/fy6hwkv26wns/wish/221829776 In geology and related fields, a stratum (plural: strata) is a layer of sedimentary rock or soil, or igneous rock where formed at the earth's surface, with internally consistent characteristics that distinguish it from other layers.]]> 2018-01-16 18:32:28 UTC https://padlet.com/304792/fy6hwkv26wns/wish/221829776 304792 https://padlet.com/304792/fy6hwkv26wns/wish/221830511 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 18:34:06 UTC https://padlet.com/304792/fy6hwkv26wns/wish/221830511 304792 https://padlet.com/304792/fy6hwkv26wns/wish/221831239 the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.]]> 2018-01-16 18:36:05 UTC https://padlet.com/304792/fy6hwkv26wns/wish/221831239 304792 https://padlet.com/304792/fy6hwkv26wns/wish/221831833 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 18:37:42 UTC https://padlet.com/304792/fy6hwkv26wns/wish/221831833 304792 https://padlet.com/304792/fy6hwkv26wns/wish/221833001 the time taken for the radioactivity of a specified isotope to fall to half its original value.]]> 2018-01-16 18:40:17 UTC https://padlet.com/304792/fy6hwkv26wns/wish/221833001 304792 https://padlet.com/304792/fy6hwkv26wns/wish/221833668 a method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.]]> 2018-01-16 18:41:33 UTC https://padlet.com/304792/fy6hwkv26wns/wish/221833668 304792 https://padlet.com/304792/fy6hwkv26wns/wish/221834559 another term for carbon dating.]]> 2018-01-16 18:43:19 UTC https://padlet.com/304792/fy6hwkv26wns/wish/221834559 304792 https://padlet.com/304792/fy6hwkv26wns/wish/221835353 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 18:44:49 UTC https://padlet.com/304792/fy6hwkv26wns/wish/221835353 304792 https://padlet.com/304792/fy6hwkv26wns/wish/221836560 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 18:47:13 UTC https://padlet.com/304792/fy6hwkv26wns/wish/221836560 304792 https://padlet.com/304792/fy6hwkv26wns/wish/221838742 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.]]> 2018-01-16 18:51:52 UTC https://padlet.com/304792/fy6hwkv26wns/wish/221838742