https://padlet.com/304017/xi96kstsyox8 Made with a stroke of good luck en-us 2018-01-16 17:34:46 UTC 2023-01-21 14:29:30 UTC hello@padlet.com 304017 https://padlet.com/304017/xi96kstsyox8/wish/221804594 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 17:36:08 UTC https://padlet.com/304017/xi96kstsyox8/wish/221804594 304017 https://padlet.com/304017/xi96kstsyox8/wish/221805552 In geology and related fields, a stratum 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 17:38:18 UTC https://padlet.com/304017/xi96kstsyox8/wish/221805552 304017 https://padlet.com/304017/xi96kstsyox8/wish/221806013 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 17:39:28 UTC https://padlet.com/304017/xi96kstsyox8/wish/221806013 304017 https://padlet.com/304017/xi96kstsyox8/wish/221806857 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 17:41:34 UTC https://padlet.com/304017/xi96kstsyox8/wish/221806857 304017 https://padlet.com/304017/xi96kstsyox8/wish/221807172 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 17:42:15 UTC https://padlet.com/304017/xi96kstsyox8/wish/221807172 304017 https://padlet.com/304017/xi96kstsyox8/wish/221807662 For example, the half-life of a radioactive substance is the amount of time it takes for half of its atoms to decay, and the half-life of a drug is the amount of time it takes before half of the active elements are either eliminated or broken down by the body.]]> 2018-01-16 17:43:10 UTC https://padlet.com/304017/xi96kstsyox8/wish/221807662 304017 https://padlet.com/304017/xi96kstsyox8/wish/221808295 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 17:44:31 UTC https://padlet.com/304017/xi96kstsyox8/wish/221808295 304017 https://padlet.com/304017/xi96kstsyox8/wish/221808727 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 17:45:28 UTC https://padlet.com/304017/xi96kstsyox8/wish/221808727 304017 https://padlet.com/304017/xi96kstsyox8/wish/221809189 Radioactive decay (also known as nuclear decay or radioactivity) 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 17:46:26 UTC https://padlet.com/304017/xi96kstsyox8/wish/221809189 304017 https://padlet.com/304017/xi96kstsyox8/wish/221809624 any of various sciences, as geography, geology, or meteorology, that deal with the earth, its composition, or any of its changing aspects. ... Geology, meaning literally “ earth science,” deals with the history of the earth and its inhabitants as revealed in the rocks.]]> 2018-01-16 17:47:17 UTC https://padlet.com/304017/xi96kstsyox8/wish/221809624