https://padlet.com/304816/9f3csn92stqd Made with an aura of mystery en-us 2018-01-23 18:23:14 UTC 2025-11-03 05:46:51 UTC hello@padlet.com 304816 https://padlet.com/304816/9f3csn92stqd/wish/223933671 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 18:25:29 UTC https://padlet.com/304816/9f3csn92stqd/wish/223933671 304816 https://padlet.com/304816/9f3csn92stqd/wish/223934015 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.]]> 2018-01-23 18:25:59 UTC https://padlet.com/304816/9f3csn92stqd/wish/223934015 304816 https://padlet.com/304816/9f3csn92stqd/wish/223934281 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.]]> 2018-01-23 18:26:22 UTC https://padlet.com/304816/9f3csn92stqd/wish/223934281 304816 https://padlet.com/304816/9f3csn92stqd/wish/223934494 A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, hair, petrified wood, oil, coal, and DNA remnants.]]> 2018-01-23 18:26:42 UTC https://padlet.com/304816/9f3csn92stqd/wish/223934494 304816 https://padlet.com/304816/9f3csn92stqd/wish/223934570 The time taken for the radioactivity of a specified isotope to fall to half its original value.]]> 2018-01-23 18:26:49 UTC https://padlet.com/304816/9f3csn92stqd/wish/223934570 304816 https://padlet.com/304816/9f3csn92stqd/wish/223934689 a method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.]]> 2018-01-23 18:27:00 UTC https://padlet.com/304816/9f3csn92stqd/wish/223934689 304816 https://padlet.com/304816/9f3csn92stqd/wish/223934868 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.]]> 2018-01-23 18:27:18 UTC https://padlet.com/304816/9f3csn92stqd/wish/223934868 304816 https://padlet.com/304816/9f3csn92stqd/wish/223935046 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 ...]]> 2018-01-23 18:27:35 UTC https://padlet.com/304816/9f3csn92stqd/wish/223935046