https://padlet.com/3049361/30rn5grdwo15 Made with a little mischief en-us 2018-01-23 19:22:48 UTC 2018-01-23 19:39:09 UTC hello@padlet.com 3049361 https://padlet.com/3049361/30rn5grdwo15/wish/223970712 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 19:23:45 UTC https://padlet.com/3049361/30rn5grdwo15/wish/223970712 3049361 https://padlet.com/3049361/30rn5grdwo15/wish/223970911 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 19:24:07 UTC https://padlet.com/3049361/30rn5grdwo15/wish/223970911 3049361 https://padlet.com/3049361/30rn5grdwo15/wish/223971055 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 19:24:22 UTC https://padlet.com/3049361/30rn5grdwo15/wish/223971055 3049361 https://padlet.com/3049361/30rn5grdwo15/wish/223971211 Half-Life is a series of first-person shooter games developed and published by Valve. The major installments feature protagonist Gordon Freeman, a theoretical physicist who battles an alien invasion]]> 2018-01-23 19:24:39 UTC https://padlet.com/3049361/30rn5grdwo15/wish/223971211 3049361 https://padlet.com/3049361/30rn5grdwo15/wish/223971416 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. ]]> 2018-01-23 19:25:00 UTC https://padlet.com/3049361/30rn5grdwo15/wish/223971416 3049361 https://padlet.com/3049361/30rn5grdwo15/wish/223971656 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 19:25:22 UTC https://padlet.com/3049361/30rn5grdwo15/wish/223971656 3049361 https://padlet.com/3049361/30rn5grdwo15/wish/223977286 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 19:35:41 UTC https://padlet.com/3049361/30rn5grdwo15/wish/223977286