https://padlet.com/3063121/au1wgapfxlit Made with eyes on the prize en-us 2018-01-22 16:21:39 UTC 2018-01-22 17:05:55 UTC hello@padlet.com 3063121 https://padlet.com/3063121/au1wgapfxlit/wish/223410344 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. The tables of geologic time spans, presented here, agree with the nomenclature, dates and standard color codes set forth by the International Commission on Stratigraphy]]> 2018-01-22 16:22:07 UTC https://padlet.com/3063121/au1wgapfxlit/wish/223410344 3063121 https://padlet.com/3063121/au1wgapfxlit/wish/223414317 In geology and related fields, a stratum is a layer of sedimentary rock or soil, or igneous rock that were formed at the earth's surface, with internally consistent characteristics that distinguish it from other layers.]]> 2018-01-22 16:28:21 UTC https://padlet.com/3063121/au1wgapfxlit/wish/223414317 3063121 https://padlet.com/3063121/au1wgapfxlit/wish/223415673 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.]]> 2018-01-22 16:30:46 UTC https://padlet.com/3063121/au1wgapfxlit/wish/223415673 3063121 https://padlet.com/3063121/au1wgapfxlit/wish/223416736 the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.]]> 2018-01-22 16:32:25 UTC https://padlet.com/3063121/au1wgapfxlit/wish/223416736 3063121 https://padlet.com/3063121/au1wgapfxlit/wish/223417472 The history of Earth concerns the development ofplanet 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.]]> 2018-01-22 16:33:35 UTC https://padlet.com/3063121/au1wgapfxlit/wish/223417472 3063121 https://padlet.com/3063121/au1wgapfxlit/wish/223418713 he time taken for the radioactivity of a specified isotope to fall to half its original value.]]> 2018-01-22 16:35:29 UTC https://padlet.com/3063121/au1wgapfxlit/wish/223418713 3063121 https://padlet.com/3063121/au1wgapfxlit/wish/223421339 a method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.]]> 2018-01-22 16:39:39 UTC https://padlet.com/3063121/au1wgapfxlit/wish/223421339 3063121 https://padlet.com/3063121/au1wgapfxlit/wish/223423625 Radiocarbon dating is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon.]]> 2018-01-22 16:43:29 UTC https://padlet.com/3063121/au1wgapfxlit/wish/223423625 3063121 https://padlet.com/3063121/au1wgapfxlit/wish/223428770 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.]]> 2018-01-22 16:52:05 UTC https://padlet.com/3063121/au1wgapfxlit/wish/223428770 3063121 https://padlet.com/3063121/au1wgapfxlit/wish/223429081 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.]]> 2018-01-22 16:52:40 UTC https://padlet.com/3063121/au1wgapfxlit/wish/223429081