https://padlet.com/3033771/gabvq097kd79 Made by Mahala en-us 2018-01-16 18:31:56 UTC 2025-10-30 17:01:41 UTC hello@padlet.com 3033771 https://padlet.com/3033771/gabvq097kd79/wish/221830251 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 18:33:31 UTC https://padlet.com/3033771/gabvq097kd79/wish/221830251 3033771 https://padlet.com/3033771/gabvq097kd79/wish/221831186 In geology and related fields, a stratum 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 18:35:58 UTC https://padlet.com/3033771/gabvq097kd79/wish/221831186 3033771 https://padlet.com/3033771/gabvq097kd79/wish/221831829 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 18:37:41 UTC https://padlet.com/3033771/gabvq097kd79/wish/221831829 3033771 https://padlet.com/3033771/gabvq097kd79/wish/221833357 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.]]> 2018-01-16 18:41:00 UTC https://padlet.com/3033771/gabvq097kd79/wish/221833357 3033771 https://padlet.com/3033771/gabvq097kd79/wish/221835076 The history of Earth concerns the development of planet Earth from its formation to the present day. ]]> 2018-01-16 18:44:16 UTC https://padlet.com/3033771/gabvq097kd79/wish/221835076 3033771 https://padlet.com/3033771/gabvq097kd79/wish/221836078 The time taken for the radioactivity of a specified isotope to fall to half its original value.]]> 2018-01-16 18:46:16 UTC https://padlet.com/3033771/gabvq097kd79/wish/221836078 3033771 https://padlet.com/3033771/gabvq097kd79/wish/221837361 Radiometric dating or radioactive dating is a technique used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed.]]> 2018-01-16 18:49:00 UTC https://padlet.com/3033771/gabvq097kd79/wish/221837361 3033771 https://padlet.com/3033771/gabvq097kd79/wish/221838421 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.]]> 2018-01-16 18:51:18 UTC https://padlet.com/3033771/gabvq097kd79/wish/221838421 3033771 https://padlet.com/3033771/gabvq097kd79/wish/221839476 Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation, such as an alpha particle, beta particle with neutrino or only a neutrino in the case of electron]]> 2018-01-16 18:53:30 UTC https://padlet.com/3033771/gabvq097kd79/wish/221839476 3033771 https://padlet.com/3033771/gabvq097kd79/wish/221840138 The age of the Earth is approximately 4.54 ± 0.05 billion.]]> 2018-01-16 18:54:44 UTC https://padlet.com/3033771/gabvq097kd79/wish/221840138