https://padlet.com/310379/vbfcgib26a64 en-us 2018-01-16 20:15:24 UTC 2023-02-10 15:08:27 UTC hello@padlet.com 310379 https://padlet.com/310379/vbfcgib26a64/wish/221875405 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 20:18:13 UTC https://padlet.com/310379/vbfcgib26a64/wish/221875405 310379 https://padlet.com/310379/vbfcgib26a64/wish/221876298 In geology and related fields, a stratum (plural: strata) is a layer of sedimentary rock or soil, or igneous rock were formed at the earth's surface, with internally consistent characteristics that distinguish it from other layers.]]> 2018-01-16 20:20:53 UTC https://padlet.com/310379/vbfcgib26a64/wish/221876298 310379 https://padlet.com/310379/vbfcgib26a64/wish/221877661 the time taken for the radioactivity of a specified isotope to fall to half its original value.]]> 2018-01-16 20:25:01 UTC https://padlet.com/310379/vbfcgib26a64/wish/221877661 310379 https://padlet.com/310379/vbfcgib26a64/wish/221878472 the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.]]> 2018-01-16 20:27:31 UTC https://padlet.com/310379/vbfcgib26a64/wish/221878472 310379 https://padlet.com/310379/vbfcgib26a64/wish/221879128 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. ... Earthformed around 4.54 billion years ago by accretion from the solar nebula.]]> 2018-01-16 20:29:13 UTC https://padlet.com/310379/vbfcgib26a64/wish/221879128 310379 https://padlet.com/310379/vbfcgib26a64/wish/221879994 The Rock Cycle is a group of changes. Igneous rock can change into sedimentary rock or into metamorphic rock. Sedimentary rock can change into metamorphic rock or into igneous rock. Metamorphic rock can change into igneous or sedimentary rock. Igneous rock forms when magma cools and makes crystals.]]> 2018-01-16 20:32:07 UTC https://padlet.com/310379/vbfcgib26a64/wish/221879994 310379 https://padlet.com/310379/vbfcgib26a64/wish/221880896 a method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample]]> 2018-01-16 20:34:54 UTC https://padlet.com/310379/vbfcgib26a64/wish/221880896 310379 https://padlet.com/310379/vbfcgib26a64/wish/221881517 another term for carbon dating.]]> 2018-01-16 20:37:02 UTC https://padlet.com/310379/vbfcgib26a64/wish/221881517 310379 https://padlet.com/310379/vbfcgib26a64/wish/221882300 Radioactive decay (also known as nuclear decay orradioactivity) is the process by which an unstable atomic nucleus loses energy (in terms of mass in its rest frame) by emitting radiation, such as an alpha particle, beta particle with neutrino or only a neutrino in the case of electron capture, gamma ray, or electron]]> 2018-01-16 20:39:19 UTC https://padlet.com/310379/vbfcgib26a64/wish/221882300 310379 https://padlet.com/310379/vbfcgib26a64/wish/221882599 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 20:40:23 UTC https://padlet.com/310379/vbfcgib26a64/wish/221882599